Reclosable package and method

• US 6,070,723 A
• Filed: 01/11/1999
• Issued: 06/06/2000
• Est. Priority Date: 01/11/1999
• Status: Expired due to Term

• Current Assignee: Portage Plastics Corporation (Lacerta Group LLC)
• Original Assignee: Portage Plastics Corporation (Lacerta Group LLC)
• Inventors: Lewis, Gregg S.
• Primary Examiner(s): Foster, Jim
• Application Number:
  US09/228,183
• Time in Patent Office: 512 Days
• Field of Search: 206/459.5, 206/461, 206/467-471, 206/335, 220/837, 220/839, 220/326
• US Class Current: 206/335
• CPC Class Codes: B65D 2585/6885 wiper blades
• CPC Class Codes: B65D 75/322 and forming one compartment
• CPC Class Codes: B65D 75/323 and forming several compartments

Abstract

A reclosable package and method having an integral reclosable door adjacent one end that permits article removal from the end of the package. The package is comprised of a thermoformed blister body joined to a thermoformed backing body. The blister body has sidewalls, endwalls and a peripheral flange broken into a first section adjacent the door where the height of the sidewalls decrease and a second section opposite the door with the first section angled relative to the second section. The backing body carries the door and has an integral peripheral rib inboard of a peripheral flange with the flange having a first section about the door and a second section disposed away from the door. The rib has a pair of longitudinally-extending sections divided by a notch that preferably is a transverse rib that causes the door to bend about a desired fold line that runs generally through or adjacent the ribs or notches when urged away from a closed position. In a preferred method, after performing a multilevel trim operation to trim the multiplanar flanges of one or both the blister body and the backing body, the two bodies are joined at the flange sections about a portion of the periphery to adjacent the fold line using an energy welding process, preferably RF welding, that produces a narrow tear seam that enables finished package flange width to be minimized to thereby also minimize package width.

Claims

1. A reclosable package comprising:

a pair of spaced apart surfaces that overlie each other and define an enclosure;

an article received in the enclosure;

wherein one of the surfaces has a door that has a closed position and an open position disposed away from the closed position;

wherein one of the surfaces comprises a) a first pair of substantially coplanar, spaced apart, outer peripheral flanges that are each disposed generally longitudinally relative to the reclosable package and which are disposed substantially parallel to a first plane, and b) a second pair of substantially coplanar, spaced apart outer peripheral flanges that are each disposed generally longitudinally relative to the reclosable package and which are disposed substantially parallel to a second plane;

wherein the other of the surfaces comprises a) a third pair of substantially coplanar, spaced apart, outer peripheral flanges that are each disposed generally longitudinally relative to the reclosable package and which are disposed substantially parallel to the first plane, and b) a fourth pair of substantially coplanar, spaced apart outer peripheral flanges that are each disposed generally longitudinally relative to the reclosable package and which are disposed substantially parallel to the second plane when the door is disposed in the closed position;

wherein the first plane is disposed at an angle relative to the second plane;

at least one seal joins at least a portion of each one of the flanges of the first pair of flanges to one of the flanges of the third pair of flanges;

wherein each one of the flanges of the second pair of flanges overlies one of the flanges of the fourth pair of flanges; and

wherein the flanges of the second pair of flanges are not attached to the flanges of the fourth pair of flanges

     1) permitting the door to be moved between the closed position and an open position, and

     2) enabling an article to be dispensed out one end of the enclosure when the door is disposed in an open position.

2. A reclosable package according to claim 1 wherein the reclosable package has a maximum width and the length of the article is longer than the maximum width of the reclosable package.

3. A reclosable package according to claim 2 wherein the door bends along a generally transversely-extending fold line when being moved toward an open position and further comprising a generally longitudinally-extending rib that extends across the fold line and a generally transversely-extending rib that extends across the generally longitudinally-extending rib that creates a region of weakness in the generally longitudinally-extending rib that causes the door to bend along the fold line when being moved toward an open position.

4. A reclosable package according to claim 3 wherein the generally transversely extending rib forms a notch in the generally-longitudinally extending rib that creates the region of weakness.

5. A reclosable package according to claim 1 further comprising a rib adjacent and around but inboard of the outer peripheral flanges of the surface having the door wherein the rib has two longitudinally-extending rib sections with each of the longitudinally-extending rib sections having a notch that creates a region of weakness in each of the longitudinally-extending rib sections that forms a living hinge in the surface having the door that enables the door to be pivoted about the living hinge toward and away from its closed position.

6. A reclosable package according to claim 1 further comprising (a) a pair of spaced apart sidewalls between the surfaces defining a package having a generally rectangular cross section, and (b) an integrally formed rib about the periphery of the surface having the door wherein the integrally formed rib has two longitudinally-extending rib sections with each of the longitudinally-extending rib sections having a notch that creates a region of weakness in each of the longitudinally-extending rib sections that forms an integral hinge in the surface having the door that enables the door to be pivoted about the integral hinge toward and away from its closed position.

7. A package according to claim 1 wherein one of the surfaces have a tab with a hole and the other of the surfaces have a tab with a hole wherein, when the package is hung from a peg that extends through each hole in each tab, movement of the door away from the closed position is opposed when the door is located in the closed position.

8. A reclosable package according to claim 6 wherein one of the surfaces has an endwall adjacent the door and the door further comprises a lip that engages the endwall when the door is located in the closed position releasably retaining the door in the closed position.

9. A reclosable package according to claim 8 wherein there is an interference fit between the lip of the door and the endwall when the door is disposed in the closed position.

10. A reclosable package according to claim 5 wherein the notch in each longitudinally-extending rib section comprises a hinge rib that extends generally transversely to the longitudinally-extending rib section and generally defines a fold line along which a portion of the door bends when moved away from the closed position.

11. A reclosable package according to claim 10 wherein the hinge rib has a generally triangular cross section.

12. A package according to claim 6 wherein

each of the surfaces, the flanges and the rib is comprised of plastic having a cross-sectional thickness of at least 0.0075 inches and no greater than 0.050 inches.

13. A reclosable package according to claim 12 wherein one of the surfaces further comprises a pair of generally longitudinally extending spaced apart sidewalls that carry two pairs of the flanges, and the surfaces and the sidewalls are self-supporting such that no card is required for support.

14. A reclosable package according to claim 12 wherein the seal comprises a RF weld that forms a tear seal.

15. A reclosable package according to claim 1 wherein

one of the surfaces comprises a backing body that is formed of thin flexible thermoformed material and has a recessed rib adjacent and around but inboard of its periphery to stiffen the backing body;

another of the surfaces is formed of thin flexible thermoformed material and is three dimensionally contoured so as to define a bubble body that is mounted to the backing body with the bubble body three dimensionally contoured so as to form a cavity therein for receiving an article therein; and

the backing body has a first outer wall section attached by an integral hinge to a second outer wall section that forms the door that releasably engages the bubble body when the door is disposed in the closed position and which permits an article to be withdrawn from the reclosable package in a direction generally parallel to the lengthwise direction of the reclosable package when the door is moved away from the closed position.

16. A reclosable package according to claim 15 wherein the package has a width and the article comprises a windshield wiper blade- or a windshield wiper blade refill having a length that is at least twice as long as the width of the package.

17. A reclosable package according to claim 15 wherein each of the surfaces has a cross-sectional thickness of no greater than about 0.050 inches.

18. A reclosable package according to claim 1 wherein the package has a cavity in which the article is received and further comprising a plurality of pairs of opposed fingers that extend inwardly from one of the surfaces into the cavity and a card received in the cavity that is retained against one of the surfaces by the fingers.

19. A reclosable package according to claim 1 wherein the package has a cavity in which the article is received, one of the surfaces is substantially clear such that a prospective purchaser can see through it, and another of the surfaces is substantially clear such that a prospective purchaser can see through it, and further comprising a tab that has a hole through which a peg can be received for hanging the package, a card received in the cavity and disposed adjacent one of the surfaces, and wherein when the package is hung from a peg, the card is disposed between the prospective purchaser and an article received in the cavity.

20. A reclosable package according to claim 19 wherein one of the surfaces has a plurality of pairs of spaced apart marks integrally molded thereinto such that the length of an article can be estimated.

21. A reclosable display package comprising:

a bubble body formed of a flexible thermoformed material having an outer wall, pair of spaced apart sidewalls extending from the outer wall, a pair of spaced apart endwalls extending from the outer wall, all of which define an article-receiving cavity, and a peripheral flange for sealing to a backing body;

a backing body formed of a thin flexible thermoformed material having a pair of spaced apart sides, a pair of spaced apart ends, a recessed rib about its periphery, a flange section about a portion of each side and one of the ends that is sealed to the peripheral flange of the bubble body, a door at an opposite end, and a hinge rib formed generally transversely in the recessed rib that generally defines a fold line about which the door bends when being moved between a closed position where the door engages one of the endwalls and a position disposed from the closed position where the door is disengaged from the one of the endwalls.

22. A reclosable package according to claim 21 wherein the flange section comprises a first flange section that is substantially planar and further comprising a second flange section that is substantially planar and disposed at an acute angle relative to the first flange section when the door is in the closed position wherein the second flange section extends from a portion of each of the sides of the backing body adjacent the door and about an end adjacent the door.

23. A reclosable package according to claim 21 wherein the hinge rib is disposed adjacent where the first flange section and second flange section meet.

24. A method of making a reclosable package comprising:

(a) providing a first sheet of a thermoformable and energy weldable material and a second sheet of a thermoformable and energy weldable material;

(b) thermoforming the first sheet into a bubble body having an article-receiving cavity with an outer wall, a pair of spaced apart integrally formed sidewalls, a pair of spaced apart integrally formed endwalls, and an integrally formed peripheral flange having a first flange section disposed about a portion of each of the sidewalls and a second flange section disposed about a remaining portion of each of the sidewalls with the second flange section disposed at an angle relative to the first flange section;

(c) thermoforming the second sheet into a backing body having an outer wall, an integrally thermoformed door at one end, an integrally thermoformed peripheral flange and an integrally thermoformed rib about the periphery that is disposed inboard of the peripheral flange with the peripheral flange having a first flange section disposed along a portion of each of the sidewalls and a second flange section about the door that is disposed along a remaining portion of each of the sidewalls, and the recessed rib having a pair of longitudinally extending sections and a pair of transversely extending rib sections with each of the longitudinally extending rib sections divided by a hinge rib into a first longitudinally extending rib portion and a second longitudinally extending rib portion such that when the door is bent relative to the first flange section a fold line extends from one of the hinge ribs to the other of the hinge ribs;

(d) trimming the first sheet in a multilevel trim operation such that the first flange section and the second flange section are trimmed substantially simultaneously with the first flange section disposed in one plane and the second flange section disposed in another plane during trimming;

(e) trimming the second sheet such that the first flange section and the second flange section are trimmed substantially simultaneously;

(f) overlapping the first sheet with the second sheet such that the first flange section of the first sheet is in contact with the first flange section of the second sheet; and

(g) sealing the first flange section of the first sheet to the first flange section of the second sheet using an energy welding process.

25. A method according to claim 24 wherein during step (e) the first flange section and the second flange section are trimmed in a multilevel trim operation.

26. A method according to claim 25 during step (b) a plurality of pairs of spaced apart and opposed fingers that extend into the article receiving cavity are molded into the sidewalls and before step (g) the additional step of placing a card into the article-receiving cavity against the outer wall with the card being retained in the article receiving cavity by the fingers.

27. A method according to claim 26 wherein the article has a length longer than the package width and is placed in the article-receiving cavity before step (g).

28. A method according to claim 24 wherein a portion of the second flange section of both the first sheet and the second sheet are trimmed during steps (d) and (e) such that a hanger hole is formed in each of the second flange sections adjacent the door.

29. A method according to claim 24 wherein during step (g) RF welding is performed.

30. A method of according to claim 29 wherein during step (g) RF welding forms a tear seam about at least a portion of the periphery of the package.

31. A method according to claim 30 wherein after step (g) the further step of removing excess flange material along the tear seam.

32. A method according to claim 31 wherein after excess flange material is removed, a finished flange about the periphery of the package is produced having a width of no greater than about 3/32 of an inch at least adjacent the tear seam.

33. A method according to claim 32 wherein the width of the finished flange about the periphery of the package extends from the rib to an outer peripheral edge of the finished flange.

34. A method according to claim 24 the further step comprising loading the article after trimming is performed in steps (d) and (e) and before sealing is performed in step (g).

35. A method according to claim 24 wherein the first sheet and the second sheet have a cross-sectional thickness of no greater than 0.050 inches, the integrally formed rib is a recessed rib, and steps (b), (c), (d), (f), and (g) are performed in the order recited.

36. A package comprising:

(a) a pair of surfaces that overlie each other and that are spaced apart to define an enclosure with one of the surfaces carrying a door that is disposed adjacent one end of the enclosure which

     1) has a closed position that retains in the enclosure an article received in the enclosure,

     2) has an open position disposed away from the closed position that permits an article received in the enclosure to be removed from the enclosure, and

     3) bends along a generally transversely-extending fold line when being moved from the closed position toward an open position;

(b) a pair of spaced apart and opposed sidewalls disposed between the surfaces such that the enclosure is tubular;

(c) a generally longitudinally-extending rib formed in the one of the surfaces carrying the door, the generally longitudinally-extending rib extending across the fold line;

(d) a generally transversely-extending rib formed in the generally longitudinally-extending rib that creates a region of weakness in the generally longitudinally-extending rib and defines the general location of the fold line;

(e) wherein the package has a maximum width and the length of the article received in the enclosure is longer than the maximum width of the package; and

(f) wherein the door has a length less than a third of the length of the package.

37. A package according to claim 36 wherein:

1) one of the surfaces comprises i) a first pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to a first plane, and ii) a second pair of substantially coplanar spaced apart and longitudinally extending outer peripheral flanges disposed substantially parallel to a second plane;

2) another of the surfaces comprises i) a third pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to the first plane, and ii) a fourth pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to the second plane when the door is disposed in the closed position;

3) the first plane is disposed at an angle relative to the second plane;

4) at least one seal joins at least a portion of each one of the flanges of the first pair of flanges to one of the flanges of the third pair of flanges;

5) each one of the flanges of the second pair of flanges overlies one of the flanges of the fourth pair of flanges; and

6) the flanges of the second pair of flanges are not attached to the flanges of the fourth pair of flanges and define the door.

38. A package according to claim 37 wherein:

the door that is carried by one of the surfaces comprises a lip that engages an upraised wall of the another one of the surfaces when the door is disposed in the closed position;

each of the surfaces, including the outer peripheral flanges of each the surfaces, have a thickness no greater than 0.050 inches; and

each flange of the first pair of the flanges and each flange of the third pair of flanges is straight and has a width no greater than 3/32 of an inch.

39. A package according to claim 38 wherein the transversely-extending rib is comprised of a first surface that is disposed at an angle relative to a second surface that is between about 80°

and about 90°

when the door is disposed in the closed position.

40. A package according to claim 38 further comprising an interference fit between the lip and the upraised wall of the another one of the surfaces wherein the door is retained in the closed position when the door is disposed in the closed position.

41. A package according to claim 40 wherein the upraised wall comprises a first endwall disposed adjacent one end of the enclosure and further comprising another endwall disposed adjacent an opposite end of the enclosure that has a width in a direction transverse to its lengthwise direction that is wider than a width of the first endwall in a direction transverse to its lengthwise direction.

42. A package according to claim 40 wherein interference fit comprises a snap fit.

43. A package according to claim 37 wherein the first plane is disposed at an angle, β

, relative to the second plane of between 20° and

45°

.

44. A reclosable package comprising:

a pair of spaced apart surfaces that define an enclosure with one of the surfaces having a door that has a closed position where the door overlies an access opening and an open position disposed away from the closed position such that the access opening is exposed such that an article in the package can be removed from the package; and

a recessed rib about the periphery of the surface having the door wherein the recessed rib has two longitudinally-extending rib sections with each of the longitudinally-extending rib sections having a notch that creates a region of weakness in each of the longitudinally-extending rib sections along which the door folds when moved away from the closed position.

45. A reclosable package according to claim 44 wherein:

1) one of the surfaces comprises i) a first pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to a first plane, and ii) a second pair of substantially coplanar spaced apart and longitudinally extending outer peripheral flanges disposed substantially parallel to a second plane;

2) another of the surfaces comprises i) a third pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to the first plane, and ii) a fourth pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to the second plane when the door is disposed in the closed position;

3) the first plane is disposed at an angle relative to the second plane;

4) at least one seal joins at least a portion of each one of the flanges of the first pair of flanges to one of the flanges of the third pair of flanges;

5) each one of the flanges of the second pair of flanges overlies one of the flanges of the fourth pair of flanges; and

6) the flanges of the second pair of flanges are not attached to the flanges of the fourth pair of flanges and define the door.

46. A reclosable package according to claim 45 wherein each flange of the first pair of the flanges and each flange of the third pair of flanges has a width of at least 1/16 of an inch and no greater than 3/32 of an inch.

47. A reclosable package according to claim 45 wherein:

the door of one of the surfaces is disposed at one end of the enclosure and comprises a lip that engages an upraised wall of the another one of the surfaces when the door is disposed in the closed position;

each of the surfaces, including the outer peripheral flanges of each the surfaces, is comprised of a vinyl or a PETG having thickness no greater than 0.050 inches; and

wherein the at least one seal comprises a seal produced by an energy welding process.

48. A reclosable package according to claim 47 wherein the reclosable package has a width of less than two inches, a first of the reclosable packages can be received on a first peg, a second of the reclosable packages can be received on a second peg, and wherein the first and second pegs are spaced apart about two inches.

49. A reclosable package according to claim 48 wherein the reclosable package has a length of at least twenty and one-half inches and the article has a length that is at least five times the maximum width of the reclosable package.

50. A reclosable package according to claim 49 wherein the article comprises a wiper blade or a wiper blade refill.

51. A reclosable package comprising a pair of spaced apart surfaces that define an enclosure with one of the surfaces having a door that has a closed position where the door overlies an access opening and an open position disposed away from the closed position such that the access opening is exposed such that an article in the package can be removed from the package;

and (a) a pair of spaced apart sidewalls between the surfaces defining a package having a generally rectangular cross section, and (b) a rib about the periphery of the surface having the door wherein the rib has two longitudinally-extending rib sections with each of the longitudinally-extending rib sections having a notch that creates a region of weakness in each of the longitudinally-extending rib sections along which the door bends when moved away from the closed position.

52. The reclosable package according to claim 51 wherein one of the surfaces has a first portion that mates with a first portion of another of the surfaces along a first plane and the one of the surfaces has a second portion that mates with a second portion of the another of the surfaces along a second plane that is disposed at an angle relative to the first plane.

53. The reclosable package according to claim 52 wherein each of the notches is comprised of a hinge rib formed in each longitudinally-extending rib section.

54. The reclosable package according to claim 53 wherein each hinge rib extends transversely relative to one of the longitudinally-extending rib section and comprises a first inclined surface disposed at an angle relative to a second inclined surface when the door is disposed in a closed position.

55. A reclosable package comprising:

(a) a pair of surfaces that overlie each other and that are spaced apart, defining an enclosure, with a door formed in one of the surfaces, the door being disposed adjacent one end of the enclosure and

     1) having a closed position,

     2) having an open position disposed away from the closed position, and

     3) bending along a fold line when being moved away from the closed position;

(b) wherein the one of the surfaces carrying the door further comprises a longitudinally-extending rib that (i) extends across the fold line, and (ii) has a notch in the longitudinally-extending rib that is disposed along the fold line;

(c) wherein the one of the surfaces is joined to the other of the surfaces along a first plane;

(d) wherein the door releasably mates with the other of the surfaces along a second plane when the door is closed; and

(e) wherein the first plane is disposed at an angle relative to the second plane.

56. A package according to claim 55 wherein:

1) the one of the surfaces comprises i) a first pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to the first plane, and ii) a second pair of substantially coplanar spaced apart and longitudinally extending outer peripheral flanges disposed substantially parallel to the second plane;

2) the other of the surfaces comprises i) a third pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to the first plane, and ii) a fourth pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to the second plane when the door is disposed in the closed position;

3) at least one seal joins at least a portion of each one of the flanges of the first pair of flanges to one of the flanges of the third pair of flanges;

4) each one of the flanges of the second pair of flanges overlies one of the flanges of the fourth pair of flanges; and

5) the flanges of the second pair of flanges are not attached to the flanges of the fourth pair of flanges and define the door.

57. A reclosable package comprising:

(a) a pair of spaced apart surfaces that define an enclosure with one of the surfaces having a door that has a closed position and an open position disposed away from the closed position;

(b) a recessed rib disposed around but inboard of the periphery of the surface having the door wherein the recessed rib has two longitudinally-extending recessed rib sections with each of the longitudinally-extending recessed rib sections having a notch defining a fold line along which the door bends when being moved away from the closed position;

(c) wherein the one of the surfaces is joined to the other of the surfaces along a first plane;

(d) wherein the door releasably mates with the other of the surfaces along a second plane when the door is disposed in the closed position; and

(e) wherein the first plane is disposed at an angle relative to the second plane.

58. A package according to claim 57 wherein:

1) the one of the surfaces comprises i) a first pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to the first plane, and ii) a second pair of substantially coplanar spaced apart and longitudinally extending outer peripheral flanges disposed substantially parallel to the second plane;

2) the other of the surfaces comprises i) a third pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to the first plane, and ii) a fourth pair of substantially coplanar spaced apart and generally longitudinally extending outer peripheral flanges disposed substantially parallel to the second plane when the door is disposed in the closed position;

3) at least one seal joins at least a portion of each one of the flanges of the first pair of flanges to one of the flanges of the third pair of flanges;

4) each one of the flanges of the second pair of flanges overlies one of the flanges of the fourth pair of flanges; and

5) the flanges of the second pair of flanges are not attached to the flanges of the fourth pair of flanges and define the door.

59. The reclosable package according to claim 57 wherein the door is disposed at one end of the reclosable package, the notch comprises a hinge-rib in each of the longitudinally-extending rib sections, and the fold line extends generally transversely from one of the hinge ribs to the other of the hinge ribs.

60. The reclosable package according to claim 57 further comprising a pair of spaced apart sidewalls and a pair of spaced apart endwalls disposed between the pair of the surfaces wherein the door is releasably retained in the closed position by engagement between the door and one of the endwalls, wherein the door is disposed at one end of the reclosable package, and wherein the one of the endwalls has a width measured in a direction perpendicular to transverse and longitudinal relative to the reclosable package that is less than a width of the other of the endwalls measured in the direction perpendicular to transverse and longitudinal relative to the reclosable package.