Improved merchandise bag with reinforced bag wall is formed of thinner than normal specially selected film material with a thickened center section. For merchandise bags, the thickened center section provides a stronger bag bottom and stronger areas for the formation of bag handles. Handle bags incl
Improved merchandise bag with reinforced bag wall is formed of thinner than normal specially selected film material with a thickened center section. For merchandise bags, the thickened center section provides a stronger bag bottom and stronger areas for the formation of bag handles. Handle bags include soft loop, round die cut oval die cut, wave top, patch and rigid handles. For T-shirt style bags, thinner plastic in the gusset and handle areas is made up for by multiple layers of film in these regions. T-shirt bags may have single, triple or folded gussets providing as many as eight layers of film in these regions. The thickened center section will substantially match the thickness of the gusseted areas and provide for a more easily stacked bag. The bags are formed of mono layer or multi-layer film and at least a portion of the bag walls is corona treated to improve adhesion.
대표청구항▼
1. An improved merchandise bag, a typical merchandise bag comprising: front and rear walls of film material of uniform thickness, each of said front and rear walls having first and second side edges, a top edge and a bottom edge;said front and rear walls being joined at said first and second side ed
1. An improved merchandise bag, a typical merchandise bag comprising: front and rear walls of film material of uniform thickness, each of said front and rear walls having first and second side edges, a top edge and a bottom edge;said front and rear walls being joined at said first and second side edges;a first lower seam, said first lower seam sealing said bottom edge of said front wall, and said bottom edge of said rear wall together; andsaid improvement comprising: at least one of said front and rear walls having an area of increased thickness, said area of increased thickness extending from said top edge to said bottom edge and from a first point spaced inwardly from said first side edge by at least a first predetermined distance to a second point spaced inwardly from said second side edge by at least said first predetermined distance; andsaid film material comprising about 40-48 wt. % high density, high molecular weight polyethylene, 12-20 wt. % high density, medium molecular weight polyethylene, 20-30 wt. % linear low density polyethylene having a melt index ranging from 0.10-0.30 gm/10 minutes and 0-8 wt. % color concentrate. 2. The improved merchandise bag, as described in claim 1, further comprising 0.5 wt. % slip and antiblock compound. 3. The improved merchandise bag, as described in claim 1, further comprising 1-3 wt. % calcium carbonate. 4. The improved merchandise bag, as described in claim 1, further comprising 10-20 wt. % recycled material, said recycled material comprising about 40-48 wt. % high density, high molecular weight polyethylene, 12-20 wt. % high density, medium molecular weight polyethylene, 20-30 wt. % linear low density polyethylene, 0-8 wt. % color concentrate. 5. The improved merchandise bag, as described in claim 1, wherein 10-15 wt. % of said linear low density polyethylene has a density ranging from 0.923-0.924 gm/cc. 6. The improved merchandise bag, as described in claim 1, wherein 10-15 wt. % of said linear low density polyethylene has a melt index ranging from 0.25-0.30 gm/10 minutes. 7. The improved merchandise bag, as described in claim 1, wherein said high density, medium molecular weight polyethylene has a density ranging from 0.937-0.947 gm/cc. 8. An improved merchandise bag, a typical merchandise bag comprising: front and rear walls of film material of uniform thickness, each of said front and rear walls having first and second side edges, a top edge and a bottom edge;said front and rear walls being joined at said first and second side edges;a first lower seam, said first lower seam sealing said bottom edge of said front wall, and said bottom edge of said rear wall together; andsaid improvement comprising: at least one of said front and rear walls having an area of increased thickness, said area of increased thickness extending from said top edge to said bottom edge and from a first point spaced inwardly from said first side edge by at least a first predetermined distance to a second point spaced inwardly from said second side edge by at least said first predetermined distance; andsaid film material comprising at least one of polylactic acid (PLA), poly-3-hydroxybutyrate (PHB) and genetically modified bioplastics. 9. The improved merchandise bag, as described in claim 1 or claim 8, a second lower seam, said second lower seam spaced upwardly from said first lower seam by a second predetermined distance. 10. The improved merchandise bag, as described in claim 1 or claim 8, further comprising a centrally disposed handle. 11. The improved merchandise bag, as described in claim 9, wherein said handle is selected from the group consisting of: soft loop, round die cut, oval die cut, wave top, patch and rigid. 12. The improved merchandise bag, as described in claim 1 or claim 8, wherein said bag is formed of either of mono layer and multi-layer film material. 13. The improved merchandise bag, as described in claim 1 or claim 8, wherein at least a portion of at least one of said front and rear bag walls is corona treated. 14. The improved merchandise bag, as described in claim 1 or claim 8, wherein said area of increased thickness ranges from 125% to 130% of thickness of a balance of film material in said bag. 15. The improved merchandise bag, as described in claim 14, wherein said balance of thermoplastic material in said bag is 80% to 85% of thickness of film material of said typical merchandise bag. 16. The improved merchandise bag, as described in claim 1 or claim 8, wherein said bag comprises 90% to 92% of film material of said typical merchandise bag. 17. The improved merchandise bag, as described in claim 1 or claim 8, wherein said area of increased thickness is 8% to 15% thicker than film material of said typical merchandise bag. 18. An improved merchandise bag, a typical merchandise bag comprising: front and rear walls of film material of uniform thickness, each of said front and rear walls having first and second side edges, a top edge and a bottom edge;first and second side gussets, said side gussets having upper and lower edges and extending inwardly from said first and second side edges of said front and rear walls for a first predetermined distance;a first lower seam, said first lower seam sealing said bottom edge of said front wall, lower edges of said first and second side gussets and said bottom edge of said rear wall together; andsaid improvement comprising: at least one of said front and rear walls having an area of increased thickness, said area of increased thickness extending from said top edge to said bottom edge and from a first point spaced inwardly from said first side edge by at least said first predetermined distance to a second point spaced inwardly from said second side edge by at least said first predetermined distance; andsaid film material comprising about 40-48 wt. % high density, high molecular weight polyethylene, 12-20 wt. % high density, medium molecular weight polyethylene, 20-30 wt. % linear low density polyethylene having a melt index ranging from 0.10-0.30 gm/10 minutes and 0-8 wt. % color concentrate. 19. The improved merchandise bag, as described in claim 18, further comprising 0.5 wt. % slip and antiblock compound. 20. The improved merchandise bag, as described in claim 18, further comprising 1-3 wt. % calcium carbonate. 21. The improved merchandise bag, as described in claim 18, further comprising 10-20 wt. % recycled material, said recycled material comprising about 40-48 wt. % high density, high molecular weight polyethylene, 12-20 wt. % high density, medium molecular weight polyethylene, 20-30 wt. % linear low density polyethylene, 0-8 wt. % color concentrate. 22. The improved merchandise bag, as described in claim 18, wherein 10-15 wt. % of said linear low density polyethylene has a density ranging from 0.923-0.924 gm/cc. 23. The improved merchandise bag, as described in claim 18, wherein 10-15 wt. % of said linear low density polyethylene has a melt index ranging from 0.25-0.30 gm/10 minutes. 24. The improved merchandise bag, as described in claim 18, wherein said high density, medium molecular weight polyethylene has a density ranging from 0.937-0.947 gm/cc. 25. An improved merchandise bag, a typical merchandise bag comprising: front and rear walls of film material of uniform thickness, each of said front and rear walls having first and second side edges, a top edge and a bottom edge;first and second side gussets, said side gussets having upper and lower edges and extending inwardly from said first and second side edges of said front and rear walls for a first predetermined distance;a first lower seam, said first lower seam sealing said bottom edge of said front wall, lower edges of said first and second side gussets and said bottom edge of said rear wall together; andsaid improvement comprising: at least one of said front and rear walls having an area of increased thickness, said area of increased thickness extending from said top edge to said bottom edge and from a first point spaced inwardly from said first side edge by at least said first predetermined distance to a second point spaced inwardly from said second side edge by at least said first predetermined distance; andsaid film material comprising at least one of polylactic acid (PLA), poly-3-hydroxybutyrate (PHB) and genetically modified bioplastics. 26. The improved merchandise bag, as described in claims 18 or 25, further comprising a second lower seam, said second lower seam spaced upwardly from said first lower seam by a second predetermined distance. 27. The improved merchandise bag, as described in claims 18 or claim 25, further comprising a centrally disposed handle. 28. The improved merchandise bag, as described in claim 27, wherein said handle is selected from the group consisting of: soft loop, round die cut, oval die cut, wave top, patch and rigid. 29. The improved merchandise, as described in claims 18 or claim 25, wherein said improved bag is formed of either of mono layer and multi-layer film material. 30. The improved merchandise bag, as described in claims 18 or claim 25, wherein at least a portion of at least one of said front and rear bag walls is corona treated. 31. The improved merchandise bag, as described in claims 18 or claim 25, wherein said area of increased thickness ranges from 125% to 130% of thickness of a balance of film material in said bag. 32. The improved merchandise bag, as described in claim 31, wherein said balance of film material in said bag is 80% to 85% of thickness of thermoplastic material of said typical gusseted merchandise bag. 33. The improved merchandise bag, as described in claims 18 or claim 25, wherein said improved bag comprises 90% to 92% of film material of said typical gusseted merchandise bag of similar size. 34. The improved merchandise bag, as described in claims 18 or claim 25, wherein said area of increased thickness is 8% to 15% thicker than film material of said typical gusseted merchandise bag. 35. An improved T-Shirt style bag, a typical T-Shirt style bag comprising: front and rear walls of film material of uniform thickness, each of said front and rear walls having first and second side edges, a top edge and a bottom edge;first and second side gussets, said side gussets having upper and lower edges and extending inwardly from said first and second side edges of said front and rear walls for a first predetermined distance;an upper seam, said upper seam sealing said top edge of said front wall, upper edges of said first and second side gussets and said top edge of said rear wall together;a first lower seam, said first lower seam sealing said bottom edge of said front wall, lower edges of said first and second side gussets and said bottom edge of said rear wall together;a U-shaped cut-out, said U-shaped cut-out being disposed in an upper portion of said bag and commencing at a first point along said top edge spaced inwardly from said first side edge and extending to a second point along said top edge spaced inwardly from said second side edge, said cut-out extending downwardly toward said bottom edges, thereby forming an open mouth portion and a pair of bag handles; andsaid improvement comprising: at least one of said front and rear walls having an area of increased thickness, said area of increased thickness extending from said open mouth portion to said bottom edge and from a first point spaced inwardly from said first side edge by at least said first predetermined distance to a second point spaced inwardly from said second side edge by at least said first predetermined distance; andsaid film material comprising about 40-48 wt. % high density, high molecular weight polyethylene, 12-20 wt. % high density, medium molecular weight polyethylene, 20-30 wt. % linear low density polyethylene having a melt index ranging from 0.10-0.30 gm/10 minutes and 0-8 wt. % color concentrate. 36. The improved T-Shirt style bag, as described in claim 35, further comprising 0.5 wt. % slip and antiblock compound. 37. The improved T-Shirt style bag, as described in claim 35, further comprising 1-3 wt. % calcium carbonate. 38. The improved T-Shirt style bag, as described in claim 35, further comprising 10-20 wt. % recycled material, said recycled material comprising about 40-48 wt. % high density, high molecular weight polyethylene, 12-20 wt. % high density, medium molecular weight polyethylene, 20-30 wt. % linear low density polyethylene, 0-8 wt. % color concentrate. 39. The improved T-Shirt style bag, as described in claim 35, wherein 10-15 wt. % of said linear low density polyethylene has a density ranging from 0.923-0.924 gm/cc. 40. The improved T-Shirt style bag, as described in claim 35, wherein 10-15 wt. % of said linear low density polyethylene has a melt index ranging from 0.25-0.30 gm/10 minutes. 41. The improved T-Shirt style bag, as described in claim 35, wherein said high density, medium molecular weight polyethylene has a density ranging from 0.937-0.947 gm/cc. 42. An improved T-Shirt style bag, a typical T-Shirt style bag comprising: front and rear walls of film material of uniform thickness, each of said front and rear walls having first and second side edges, a top edge and a bottom edge;first and second side gussets, said side gussets having upper and lower edges and extending inwardly from said first and second side edges of said front and rear walls for a first predetermined distance;an upper seam, said upper seam sealing said top edge of said front wall, upper edges of said first and second side gussets and said top edge of said rear wall together;a first lower seam, said first lower seam sealing said bottom edge of said front wall, lower edges of said first and second side gussets and said bottom edge of said rear wall together;a U-shaped cut-out, said U-shaped cut-out being disposed in an upper portion of said bag and commencing at a first point along said top edge spaced inwardly from said first side edge and extending to a second point along said top edge spaced inwardly from said second side edge, said cut-out extending downwardly toward said bottom edges, thereby forming an open mouth portion and a pair of bag handles; andsaid improvement comprising: at least one of said front and rear walls having an area of increased thickness, said area of increased thickness extending from said open mouth portion to said bottom edge and from a first point spaced inwardly from said first side edge by at least said first predetermined distance to a second point spaced inwardly from said second side edge by at least said first predetermined distance; andsaid film material comprising at least one of polylactic acid (PLA), poly-3-hydroxybutyrate (PHB) and genetically modified bioplastics. 43. The improved T-Shirt style bag, as described in claims 35 or claim 42, further comprising: a third side gusset, said third side gusset having an upper edge and a lower edge and extending inwardly from said first side edge of said front wall for a second predetermined distance and outwardly for a third predetermined distance to join said first side gusset;a fourth side gusset, said fourth side gusset having an upper edge and a lower edge and extending inwardly from said first side edge of said rear wall for said second predetermined distance and outwardly for said third predetermined distance to join said first side gusset;a fifth side gusset, said fifth side gusset having an upper edge and a lower edge and extending inwardly from said second side edge of said front wall for said second predetermined distance and outwardly for said third predetermined distance to join said second side gusset;a sixth side gusset, said sixth side gusset having an upper edge and a lower edge and extending inwardly from said second side edge of said rear wall for said second predetermined distance and outwardly for said third predetermined distance to join said second side gusset;wherein said upper seam seals said top edge of said front wall, said upper edges of said first, second, third, fourth, fifth and sixth side gussets and said top edge of said rear wall together; andwherein said lower seam seals said bottom edge of said front wall, said lower edges of said first, second, third, fourth, fifth and sixth side gussets and said bottom edge of said rear wall together. 44. The improved T-Shirt style bag, as described in claim 35 or claim 42, further comprising: a first folded portion, said first folded portion having an upper edge and a lower edge and being folded into said first side gusset from said first side edge of said front wall for a second predetermined distance;a second folded portion, said second folded portion having an upper edge and a lower edge and being folded into said first side gusset from said first side edge of said rear wall for said second predetermined distance;a third folded portion, said third folded portion having an upper edge and a lower edge and being folded into said second side gusset from said second side edge of said front wall for said second predetermined distance;a fourth folded portion, said fourth folded portion having an upper edge and a lower edge and being folded into said second side gusset from said second side edge of said rear wall for said second predetermined distance;wherein said upper seam seals said top edge of said front wall, said upper edges of said first and second side gussets, said upper edges of said first, second, third and fourth folded portions and said top edge of said rear wall together; andwherein said lower seam seals said bottom edge of said front wall, said lower edges of said first and second side gussets, said lower edges of said first, second, third and fourth folded portions and said bottom edge of said rear wall together. 45. The improved T-Shirt style bag, as described in claims 35 or claim 42, further comprising: first and second openings, said first and second openings penetrating and extending transversely through each of said bag handles; andsaid openings being spaced downwardly from said top edge, spaced inwardly from said first and second side edges and serving to support said bag on horizontal arms of a dispensing rack. 46. The improved T-Shirt style bag, as described in claims 35 or claim 42, wherein at least a portion of at least one of said front and rear bag walls is corona treated. 47. The improved T-Shirt style bag, as described in claim 35 or 42, further comprising: a central tab portion connected to said open mouth portion of said bag; andan aperture, said aperture extending transversely through said bag within said central tab portion for suspending said bag from a dispensing rack. 48. The improved T-Shirt style bag, as described in claim 46, wherein said central tab is attached to said bag mouth portion with a frangible section, said frangible section breaking when said bag is pulled from said dispensing rack. 49. The improved T-Shirt style bag, as described in claim 46, wherein said aperture in said central tab further comprises a frangible portion, said frangible portion breaking when said bag is pulled from said dispensing rack. 50. The improved T-Shirt style bag, as described in claim 35 or 42, wherein said open mouth portion comprises stress relief areas, said stress relief areas having curved inner corners wherein a cut line forming said corners extends from a vertical inner edge of said bag handle outwardly toward one of said first and second side edges, downwardly toward said lower seam and upwardly at a shallow angle toward a center line of said front and rear bag walls, thereby reducing the likelihood that said open mouth portion may tear under tension. 51. The improved T-Shirt style bag, as described in claims 35 or claim 42, further comprising a second lower seam, said second lower seam spaced upwardly from said first lower seam by a second predetermined distance. 52. The improved T-Shirt style bag, as described in claims 35 or claim 42, wherein said area of increased thickness ranges from 125% to 130% of thickness of a balance of film material in said bag. 53. The improved T-Shirt style bag, as described in claim 35 or 42, wherein said balance of thermoplastic material in said bag is 80% to 85% of thickness of film material of said typical merchandise bag. 54. The improved T-Shirt style bag, as described in claim 35 or 42, wherein said bag comprises 90% to 92% of film material of said typical merchandise bag of similar size. 55. The improved T-Shirt style bag, as described in claim 35 or 42, wherein said area of increased thickness is 8% to 15% thicker than film material of said typical merchandise bag. 56. The improved T-Shirt style bag, as described in claim 35 or 42, further comprising: at least one pair of additional first side edge gussets, each of said first side edge gussets having an upper edge and a lower edge and extending inwardly from said first side edge of either of said front wall, said rear wall and one of said additional first side edge gussets for a second predetermined distance and outwardly for a third predetermined distance to join either of said first side gusset and one of said additional first side edge gussets;at least one pair of additional second side edge gussets, each of said second side edge gussets having an upper edge and a lower edge and extending inwardly from said second side edge of either of said front wall, said rear wall and one of said additional second side edge gussets for said second predetermined distance and outwardly for said third predetermined distance to join either of said second side gusset and one of said additional second side edge gussets;wherein said upper seam seals said top edge of said front wall, said upper edges of said first and second gussets, at least one pair of additional first side edge gussets, at least one pair of additional second side edge gussets and said top edge of said rear wall together; andwherein said lower seam seals said bottom edge of said front wall, said lower edges of said first and second gussets, at least one pair of additional first side edge gussets, at least one pair of additional second side edge gussets and said bottom edge of said rear wall together. 57. The improved T-Shirt style bag, as described in claim 35 or 42, further comprising: at least one pair of first side folded portions, said first side folded portions having an upper edge and a lower edge and being folded into either of said first side gusset and one of said first side folded portions from said first side edge of either of said front wall, said rear wall and one of said first side folded portions for a second predetermined distance;at least one pair of second side folded portions, said second side folded portions having an upper edge and a lower edge and being folded into either of said second side gusset and one of said second side folded portions from said second side edge of either of said front wall, said rear wall and one of said second side folded portions for said second predetermined distance;wherein said upper seam seals said top edge of said front wall, said upper edges of said first and second side gussets, said upper edges of said at least one pair of first side folded portions, said at least one pair of second side folded portions and said top edge of said rear wall together; andwherein said lower seam seals said bottom edge of said front wall, said lower edges of said first and second side gussets, said lower edges of said at least one pair of first side folded portions, said at least one pair of second side folded portions and said bottom edge of said rear wall together.
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이 특허에 인용된 특허 (27)
Cazes Michel (Vittel FRX), Bag made of flexible synthetic material and possessing a stiffening and stabilizing means.
Baxley William H. (Hartsville SC) Weatherford Marion H. (Hartsville SC) Wilfong ; Jr. Harry B. (Hartsville SC) Williams Floyd B. (Hartsville SC), Bag pack.
Benoit Gordon L. (Macedon NY) Donaldson Jack J. (Fairport NY) Heilman Paul D. (Williamson NY), Method of preparing a thermoplastic bag having reinforced handles.
Clayton ; William J. ; Olson ; Robert H. ; Kutniewski ; Donald F., Reinforced thin wall plastic bag, and method and apparatus to make material for such bags.
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