Stripping device for a press

• US 7,360,475 B2
• Filed: 06/22/2004
• Issued: 04/22/2008
• Est. Priority Date: 04/08/2004
• Status: Expired due to Fees

• Current Assignee: Paolo Quercia
• Original Assignee: Paolo Quercia
• Inventors: Quercia, Paolo
• Primary Examiner(s): Peterson; Kenneth E.
• Assistant Examiner(s): NGUYEN, PHONG H
• Application Number:
  US10/872,388
• Publication Number:
  US 20050227847A1
• Time in Patent Office: 1,400 Days
• Field of Search: 833/43, 836/63, 83117-119, 83/27, 831/11, 831/24, 831/32, 83138-143, 833/47, 831/45, 831/46, 831/28, 831/29, 83/53, 831/02, 831/13, 831/15, 833/48, 838/86, 838/79, 493/342, 493/373, 761/071, 761/078, 225/93, 225/97, 225/103
• US Class Current: 83/111
• CPC Class Codes: B26D 2007/1881 using countertools
• CPC Class Codes: B26D 2007/189 Mounting blanking, stripping and break-out tools
• CPC Class Codes: B26D 7/1818 by pushing out
• CPC Class Codes: B31B 50/00 Making rigid or semi-rigid containers, e.g. boxes or cartons
• CPC Class Codes: B31B 70/00 Making flexible containers, e.g. envelopes or bags
• CPC Class Codes: Y10T 225/30 Breaking or tearing apparatus
• CPC Class Codes: Y10T 83/2096 Means to move product out of contact with tool
• CPC Class Codes: Y10T 83/217 Stationary stripper

Abstract

A stripping device for stripping a waste piece from a sheet of material, which includes a stripping member with a connecting portion, a supporting finger located on one side of the connecting portion, and a stripping finger located on another side of the connecting portion. The supporting finger has one end connected to a frame and is movable about its end with respect to the frame. The stripping finger has a stripping end portion, which is biased away from the supporting finger and contacts the waste piece at an angle. The supporting finger is deflected away from the waste piece and the stripping end portion is moved further away from the supporting finger and against the waste piece to strip it from the sheet.

Claims

1. A stripping device for stripping a waste piece from a sheet of material, the device comprising:

a) a stripping member having a connecting portion, a supporting finger located on one side of the connecting portion, and a stripping finger located on another side of the connecting portion;

b) a frame having a planar body having at least one body opening located therein, and a die connected thereto and in register with the body opening, the die having a planar surface substantially facing the stripping finger;

c) the supporting finger having a first end connected to the frame, the supporting finger being movable about the first end with respect to the frame;

d) the stripping finger having a stripping end portion, the stripping end portion being disposed towards the body opening in alignment with the die and being biased away from the supporting finger for contacting at an angle the waste piece to be stripped, the stripping end portion being slidable relative to and along the planar surface of the die with the waste piece therebetween to deflect the waste piece as the waste piece moves towards the body opening, the stripping end portion being movable further away from the supporting finger and against the waste piece so as to strip the waste piece, the body opening receiving the waste piece, the stripping end portion slidably and directly contacting the planar surface of the die after stripping of the waste piece.

2. The device, according to claim 1, in which:

a) the first end of the supporting finger is located adjacent the body opening.

3. The device, according to claim 2, in which:

a) the stripping end portion is disposed into the body opening and inclined away from the supporting finger.

4. The device, according to claim 1, in which:

a) the connecting portion is an arcuate portion, the supporting finger and the stripping finger being connected to each end of the arcuate portion.

5. The device, according to claim 4, in which the stripping finger has:

a) a distal portion for connecting the stripping finger to the arcuate portion;

b) an intermediate portion; and

c) a proximal portion for connecting the stripping end portion to the intermediate portion, the intermediate portion interconnecting the distal portion and the proximal portion.

6. The device, according to claim 5, in which:

a) the intermediate portion tapers away from the distal portion towards the proximal portion, the proximal portion being narrower than the distal portion.

7. The device, according to claim 4, in which:

a) the proximal portion is an elongate rectangular strip, the stripping end portion being located at a squared end of the rectangular strip.

8. The device, according to claim 1, in which:

a) the stripping finger is resiliently hinged to the connecting portion to permit movement of the stripping end portion relative to the supporting finger between default and stripping positions.

9. The device, according to claim 8, in which:

a) the stripping finger is resiliently hinged about a first resilient hinge.

10. The device, according to claim 9, in which:

a) the first resilient hinge has a first hinge axis which is perpendicular to the opening axis.

11. The device, according to claim 1, in which the supporting finger has:

a) a distal portion for connecting the supporting finger to the connecting portion;

b) an intermediate portion; and

c) a proximal portion for connecting the first end of the supporting finger to the intermediate portion, the intermediate portion interconnecting the distal portion and the proximal portion.

12. The device, according to claim 11, in which:

a) the distal portion and the proximal portion taper towards the intermediate portion, the intermediate portion being narrower than the distal and proximal portions.

13. The device, according to claim 12, in which:

a) the distal portion has a connecting foot connected to the frame and disposed away from the body opening.

14. The device, according to claim 1, in which:

a) the supporting finger is resiliently hinged to the frame to permit movement of the supporting finger relative to the frame between default and stripping positions.

15. The device, according to claim 14, in which:

a) the supporting finger is resiliently hinged about a second resilient hinge.

16. The device, according to claim 15, in which:

a) the body opening has an opening axis; and

b) the second resilient hinge has a second hinge axis which is perpendicular to the opening axis.

17. The device, according to claim 15, in which:

a) the stripping finger has a first resilient hinge with a first hinge axis;

b) the second hinge axis and the first hinge axis being parallel to each other, the first and second hinge axes being perpendicular to the opening axis.

18. The device, according to claim 1, in which:

a) the length of the stripping finger is longer than the length of the supporting finger.

19. The device, according to claim 1, in which:

a) the stripping end portion is disposed below the first end.

20. The device, according to claim 1, in which:

a) the stripping member is made from a single piece of forded over material.

21. The device, according to claim 1, in which:

a) the stripping member is made from a single piece of folded over resilient material.

22. The device, according to claim 21, in which:

a) the resilient material is hardened steel.

23. The device, according to claim 21, in which:

a) the resilient material is plastic.

24. The device, according to claim 1, further includes:

a) a blocking member for blocking the waste piece after it has been stripped, the blocking member having a second end connected to the frame and a blocking portion, the blocking member being movable about the second end, the stripping finger being locatable adjacent the blocking portion.

25. The device, according to claim 24, in which:

a) the second end of the blocking member is located adjacent the body opening and the blocking portion is disposed towards the body opening.

26. The device, according to claim 25, in which:

a) the blocking portion is disposed into the body opening and inclined away from the second end.

27. The device, according to claim 24, in which:

a) the stripping finger has a proximal portion, the proximal portion being an elongate rectangular strip;

b) the blocking portion having a pair of blocking fingers connected to the second end, the blocking fingers being spaced apart to define a gap therebetween, the gap being of sufficient size to permit the rectangular strip to move between the blocking fingers.

28. The device, according to claim 27, in which each blocking finger has:

a) a proximal blocking panel for contacting the waste piece;

b) a distal portion for connecting the blocking finger to the second end;

c) an intermediate portion interconnecting the proximal blocking panel with the distal portion.

29. The device, according to claim 28, in which:

a) the proximal blocking panel is disposed perpendicular to the intermediate portion.

30. The device, according to claim 29, in which:

a) the body opening has an opening axis;

b) the proximal blocking panel is disposed parallel to the opening axis.

31. The device, according to claim 27, in which:

a) the rectangular strip is disposed rearwardly of the blocking fingers in the default position.

32. The device, according to claim 28, in which:

a) the distal portion is resiliently hinged to the second end to permit movement of the blocking fingers relative to the second end between default and stripping positions.

33. The device, according to claim 32, in which:

a) the distal portion is resiliently hinged about a third resilient hinge.

34. The device, according to claim 24, in which:

a) the second end of the blocking member and the first end of the stripping member are connected together.

35. The device, according to claim 24, in which:

a) the stripping finger has a proximal portion, the proximal portion being an elongate rectangular strip;

b) the blocking portion having a pair of blocking panels connected to the second end, the blocking panels being spaced apart to define a gap therebetween, the gap being of sufficient size to permit the rectangular strip to move between the blocking panels.

36. The device, according to claim 24, in which:

a) the stripping finger has a proximal portion, the proximal portion being an elongate rectangular strip;

b) the blocking portion having a pair of blocking wires connected to the second end, the blocking fingers being spaced apart to define a gap therebetween, the gap being of sufficient size to permit the rectangular strip to move between the blocking wires.

37. The device, according to claim 24, in which:

a) the blocking member is made from a single piece of resilient material.

38. The device, according to claim 37, in which:

a) the resilient material is stainless steel.

39. The device, according to claim 37, in which:

a) the resilient material is plastic.

40. The device, according to claim 1, in which:

a) the sheet of material is pre-cut paperboard, the waste piece being partially connected within the paperboard.

41. The device, according to claim 1, in which:

a) a blocking member for blocking the waste piece after it has been stripped, the blocking member having a stationary finger fixedly connected to the frame, the stationary finger being spaced apart from the die and defining a blocking gap therebetween.

42. The device, according to claim 41, in which:

a) the stationary finger includes a planar surface, the stationary finger being tapered away from the frame towards the planar surface, the stripping finger being slidable along the planar surface towards the blocking gap during a stripping operation.

43. A stripping device for use in a die cutting press, for stripping a waste piece from a pre-cut sheet, the press having a first frame having at least one frame opening therein and a second frame having at least one punch complementary with the frame opening, the frames being movable with respect to each other, the punch being cooperable with the frame opening, the device comprising:

a) a folded over piece of resilient material having a supporting finger located on one side of the fold, and a stripping finger located on another side of the fold, the supporting finger having a first end connected to the first frame, the supporting finger being movable about the first end with respect to the first frame, the stripping finger having a stripping end portion, the stripping end portion being resiliently biased away from the supporting finger for contacting at an angle the waste piece to be stripped, the stripping end portion being slidable along the punch to deflect the waste piece, the stripping end portion being movable further away from the supporting finger and against the waste piece so as to strip the waste piece;

b) a blocking member for blocking the waste piece after it has been stripped, the blocking member having a second end connected to the frame and a pair of blocking fingers resiliently hinged to the second end, the blocking fingers being spaced apart to define a gap therebetween, the gap being of sufficient size to permit the stripping end portion to move between the blocking fingers.

44. The device, according to claim 43, in which:

a) the first end and the second end are connected together.

45. The device, according to claim 43, in which:

a) the fold is arcuate.

46. A stripping device for use in a die cutting press, for stripping a waste piece from a pre-cut sheet, the press having a first frame having at least one frame opening therein and a second frame having at least one punch complementary with the frame opening, the frames being movable with respect to each other, the punch being cooperable with the frame opening, the device comprising:

a) a folded over piece of resilient material having a supporting finger located on one side of the fold, and a stripping finger located off another side of the fold, the supporting finger having a first end connected to the first frame, the supporting finger being movable about the first end with respect to the first frame, the stripping finger having a stripping end portion, the stripping end portion being resiliently biased away from the supporting finger for contacting at an angle the waste piece to be stripped, the supporting finger being deflectable away from the waste piece, the stripping end portion being movable further away from the supporting finger;

b) an abutment member for blocking the waste piece after it has been stripped, the abutment member having a stationary finger fixedly connected to the second frame, the stationary finger being spaced apart from the punch and defining a blocking gap therebetween, the stationary finger includes a planar surface, the stationary finger being tapered away from the second frame towards the planar surface, the stripping end portion being slidable along the planar surface against the waste piece towards the blocking gap so as to strip the waste piece.