Method and apparatus for inspecting and grading garments

• US 5,703,688 A
• Filed: 03/04/1996
• Issued: 12/30/1997
• Est. Priority Date: 01/12/1995
• Status: Expired due to Fees

• Current Assignee: Monarch Knitting Machinery Corporation
• Original Assignee: Monarch Knitting Machinery Corporation
• Inventors: Bell, Cecil Roland
• Primary Examiner(s): Font, Frank G.
• Assistant Examiner(s): VIERRA EISENBERG, JASON D
• Application Number:
  US08/610,408
• Time in Patent Office: 666 Days
• Field of Search: 356/420, 356/238, 356/239, 356/394, 250/559.42, 250/559.12-559.15, 250/559.39
• US Class Current: 356/430
• CPC Class Codes: D06H 3/16 Inspecting hosiery or other tubular fabric; Inspecting in combination with turning inside-out, classifying, or other handling
• CPC Class Codes: G01N 21/84 Systems specially adapted for particular applications

Abstract

A garment inspecting and grading apparatus and methods of inspecting a garment are provided that preferably have a mounting member arranged to mount a garment thereon. A light emitter is positionally aligned closely adjacent the mounting member to emit light through a predetermined portion of a garment mounted thereon. A light detector is also positionally aligned with the light emitter to detect either the presence or absence of light traveling from the light emitter. A controller is positioned in electrical communication with the light detector and arranged to determine the presence and absence of defects in a predetermined portion of a garment responsive to electrical signals representative of the presence or absence of light received from the light detector. A grader and sorter are positioned downstream from the light emitter and the light detector for sorting an inspected garment into one of a plurality of predetermined quality groups.

Claims

1. A garment inspecting and grading apparatus for inspecting a garment, the apparatus comprising:

means for mounting a garment thereon, said mounting means being formed of translucent material;

optical inspecting means positioned adjacent said mounting means for inspecting predetermined portions of a garment mounted on said mounting means, said optical inspecting means including at least one light emitter positionally aligned with a portion of said mounting means to emit light through a predetermined portion of a garment mounted thereon and at least one light detector positionally aligned with said at least one light emitter and the portion of said mounting means to detect either the presence or absence of light traveling from said light emitter and through the predetermined portion of a garment article mounted on said mounting means so that presence and absence of defects in a garment are thereby determined; and

means positioned downstream from said mounting means and said optical inspecting means and in electrical communication with said optical inspecting means for grading and sorting a garment into one of a plurality of predetermined quality groups responsive to the presence or absence of defects detected by said optical inspecting means.

2. A garment inspecting and grading apparatus as defined by claim 1, wherein said grading and sorting means includes means positioned adjacent said mounting means for removing and receiving an inspected and graded garment from said mounting means.

3. A garment inspecting and grading apparatus as defined by claim 2, further comprising means positioned downstream from said grading and sorting means for receiving and packaging an inspected and graded garment.

4. A garment inspecting and grading apparatus as defined by claim 2, further comprising means in electrical communication with said optical inspecting means and said grading and sorting means for controlling said grading and sorting means responsive to electrical signals received from said optical inspecting means.

5. A garment inspecting and grading apparatus as defined by claim 4, wherein said mounting means comprises at least one elongate boarding member arranged to mount a leg of a garment thereon, and wherein said at least one light emitter and said at least one light detector of said optical inspecting means are mounted for reciprocatory movement upwardly and downwardly along said mounting means.

6. A garment inspecting and grading apparatus as defined by claim 4, wherein said at least one light emitter and said at least one light detector of said optical inspecting means respectively comprise at least a first light emitter and at least a first light detector arranged to inspect at least a first predetermined portion of a garment.

7. A garment inspecting and grading apparatus as defined by claim 6, wherein said mounting means comprises a pair of elongate and spaced-apart boarding members respectively arranged to mount a pair of legs of a garment thereon, and wherein said at least a first light emitter and said at least a first light detector of said optical inspecting means are mounted for reciprocatory movement upwardly and downwardly along at least one of said elongate boarding members.

8. A garment inspecting and grading apparatus as defined by claim 1, further comprising means in electrical communication with said at least one light detector for storing data representative of defects in a garment.

9. A garment inspecting apparatus for inspecting a garment, the apparatus comprising:

a mounting member formed of translucent material arranged to mount at least a portion of a garment thereon;

a light emitter positionally aligned closely adjacent said boarding member to emit light through a predetermined portion of a garment mounted thereon;

a light detector positionally aligned with said light emitter to detect either the presence or absence of light traveling from said light emitter;

a controller in electrical communication with said light detector and arranged to determine the presence and absence of defects in a predetermined portion of a garment responsive to electrical signals representative of the presence or absence of light received from said light detector; and

means positioned downstream from said light emitter and said light detector for sorting an inspected garment into one of a plurality of predetermined quality groups.

10. A garment inspecting apparatus as defined by claim 9, wherein said sorting means includes means positioned adjacent said mounting member for removing and receiving an inspected garment therefrom, said removing and receiving means comprising a manifold positioned to received an inspected garment therein, a plurality of tubes connected to said manifold and arranged to sort an inspected garment responsive to said controller, and a pneumatic device connected to said tubes and arranged to provide a pressurized removal of an inspected garment article mounted on said mounting member.

11. A garment inspecting and grading apparatus for inspecting a hosiery garment, the apparatus comprising:

a base;

a plurality of mounting members rotatably connected to said base for mounting at least leg and gusset portions of a hosiery garment thereon;

at least one light emitter positionally aligned closely adjacent said mounting member and mounted to said base for emitting light through a predetermined portion of a leg of a hosiery garment during reciprocal and vertical movement along a leg of a hosiery garment mounted on at least one of said plurality of mounting members;

at least one light detector positionally aligned with said at least one light emitter for detecting either the presence or absence of light traveling from said at least one light emitter;

a controller in electrical communication with said at least one light detector and arranged to determine the presence and absence of defects in a predetermined portion of a garment responsive to electrical signals representative of the presence or absence of light received from said light detector; and

means positioned downstream from said light emitter and said light detector for sorting an inspected garment into one of a plurality of predetermined quality groups.

12. A garment inspecting apparatus as defined by claim 11, wherein said sorting means includes means positioned adjacent one of said plurality of mounting members for removing and receiving an inspected hosiery garment therefrom, said removing and receiving means comprising a manifold positioned to received an inspected garment therein, a plurality of tubes connected to said manifold and arranged to sort an inspected garment responsive to said controller, and a pneumatic device connected to said tubes and arranged to provide a pressurized removal of an inspected hosiery garment mounted on said mounting member.

13. A garment inspecting and grading apparatus as defined in claim 12, wherein said plurality of mounting members comprises at least three spaced-apart mounting members rotatably connected to said base, said plurality of mounting members being respectively mounted at predetermined angles from each other so that a first position of said at least three mounting members is a position for loading a hosiery garment thereon, a second position is a position for inspecting and grading a loaded hosiery garment, and a third position is a position for unloading and sorting a hosiery garment.

14. A garment inspecting apparatus for inspecting a stitch line of a garment, the garment inspecting apparatus comprising:

a mounting member positioned to mount at least portions of a garment to be inspected;

a shadow-forming member positioned adjacent said mounting member and a stitch line of a mounted garment;

a light source positioned to emit light along at least a portion of stitch line of a garment so as to cause a shadow to be formed on said shadow-forming member; and

at least one detector positionally aligned with said shadow-forming member to detect the presence and absence of light positioned on said shadow-forming member so that presence and absence of defects in a stitch line of a garment are thereby determined.

15. A garment inspecting apparatus as defined in claim 14, further comprising means positioned downstream from said mounting member and in electrical communication with said at least one detector for grading and sorting a garment responsive to the presence or absence of defects detected by said at least one detector.

16. A garment inspecting apparatus as defined by claim 15, further comprising means in electrical communication with said at least one detector and said grading and sorting means for controlling said grading and sorting means responsive to electrical signals received from said at least one detector.

17. A garment inspecting apparatus as defined in claim 14, further comprising means positionally aligned closely adjacent said mounting member for sewing a stitch line in a garment.

18. A garment inspecting apparatus as defined in claim 14, further comprising means positioned adjacent said at least one detector for directing a gas toward a stitch line of a garment so as to cause a defect in a stitch line to be more easily recognized by said at least one detector.

19. A garment inspecting apparatus for inspecting a stitch line of a hosiery garment, the garment inspecting apparatus comprising:

a pair of elongate and spaced-apart boarding members arranged to mount a pair of legs of a hosiery garment thereon;

means positioned closely adjacent said pair of mounting members for sewing a stitch line in legs of a hosiery garment mounted on said pair of boarding members;

a shadow-forming board member positioned adjacent a stitch line of a hosiery garment;

a light source positioned to emit light along at least a portion of a stitch line of a hosiery garment so as to cause a shadow to be formed on said shadow-forming board member; and

a light detector positionally aligned with said board member to detect the presence and absence of defects in a stitch line responsive to a shadow formed on said board member so that presence and absence of defects in a stitch line of a hosiery garment are thereby determined.

20. A garment inspecting apparatus as defined in claim 19, further comprising means positioned downstream from said pair of mounting members and in electrical communication with said at least one detector for grading and sorting a garment responsive to the presence or absence of defects detected by said at least one detector.

21. A garment inspecting apparatus as defined by claim 20, further comprising means in electrical communication with said at least one detector and said grading and sorting means for controlling said grading and sorting means responsive to electrical signals received from said at least one detector.

22. A garment inspecting apparatus as defined in claim 21, further comprising means positionally aligned closely adjacent said mounting member for sewing a stitch line in a hosiery garment.

23. A garment inspecting apparatus as defined in claim 22, further comprising means positioned adjacent at least one detector for directing a gas toward a stitch line of a garment so as to cause a defect in a stitch line to be more easily recognized by said at least one detector.

24. A garment sewing and inspecting apparatus for inspecting a toe portion of a leg of a hosiery garment, the garment inspecting apparatus comprising:

at least one elongate mounting member arranged to mount a toe portion of a leg of a hosiery garment thereon;

means for sewing a stitch line into a toe portion of a leg of a hosiery garment;

a shadow-forming board member positioned adjacent a stitched toe line of a hosiery garment;

a light source positioned to emit light along at least a portion of a stitched toe line of a hosiery garment so as to cause a shadow to be formed on said board member; and

a light detector positionally aligned with said board member to detect the presence and absence of defects in a stitched toe line responsive to a shadow formed on said board member so that presence and absence of defects in a stitched toe line of a hosiery garment are thereby determined.

25. A garment inspecting apparatus as defined in claim 24, further comprising means positioned downstream from said pair of mounting members and in electrical communication with said at least one detector for grading and sorting a garment responsive to the presence or absence of defects detected by said at least one detector.

26. A garment inspecting apparatus as defined by claim 25, further comprising means in electrical communication with said at least one detector and said grading and sorting means for controlling said grading and sorting means responsive to electrical signals received from said at least one detector.

27. A garment inspecting apparatus as defined in claim 26, further comprising means positioned adjacent at least one detector for directing a gas toward a stitch line of a toe portion of a hosiery garment so as to cause a defect in a stitch line to be more easily recognized by said at least one detector.

28. A method of inspecting a stitch line of a garment comprising:

emitting light closely adjacent a portion of a stitch line of a garment mounted on a mounting member while forming a shadow of the portion of the stitch line; and

detecting the presence and absence of defects in the portion of the stitch line responsive to a shadow representative of the presence and absence of defects in the portion of the stitch line of a garment.

29. A method of inspecting a stitch line of a garment as defined by claim 28, further comprising grading a garment into at least one of a plurality of predetermined quality groups responsive to detecting the presence or absence of defects therein.

30. A method of inspecting a stitch line of a garment as defined by claim 28, further comprising directing a gas toward a stitch line of a garment so as to cause a defect in the stitch line to be more easily recognized.

31. A method of inspecting a stitch line of a garment comprising:

emitting light closely adjacent a stitch line of a garment mounted on a mounting member while forming a shadow of the stitch line;

directing a gas toward the stitch line so as to cause a defect in the stitch line to be more easily recognized;

detecting the presence and absence of defects in the stitch line responsive to a shadow representative of the presence and absence of defects in the stitch line of a garment; and

grading and sorting a garment into at least one of a plurality of predetermined quality groups responsive to detecting the presence or absence of defects therein.

32. In an apparatus for making garments from blanks including means for receiving and mounting garment blanks in operative association, means for sewing the garment blanks to form seams thereof securing portions of the garment blanks together, and means for conveying the garment blanks to and from said sewing means, the combination of means for optically inspecting and grading the garment blanks based upon the presence and absence of defects in the seams formed, said optical inspecting and grading means comprising a light source operatively associated with said conveying means downstream of said sewing means for directing a beam of light onto the seam after the seam is formed, a detector operatively associated with said conveying means and said light source for detecting any defects in the seam exposed by said light source and for generating a signal indicative of the presence or absence of such defects, and a controller in electrical communication with said detector for grading a garment based upon the presence or absence of defects in the seam.

33. Apparatus according to claim 32 wherein said garment making apparatus is a line closer for receiving respective pairs of hosiery blanks and for forming the blanks into a pair of pantyhose.

34. Apparatus according to claim 32 wherein said garment making apparatus is a toe closer for receiving the leg portions of pantyhose and sewing toe portions thereof to close the same.