Patents Assigned to Durabag Co., Inc.
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Patent number: 6446810Abstract: A pack of self-opening bags with a front, rear, and co-joined side walls, with front and rear tabs extending from top edges of the front and rear walls. The tabs have a curved aperture slits therein, and the tabs are frangibly adhered together with contact adhesive. The slit has a main cut section, a first curved end section at one end, and a second curved end section at the opposite end. The first curved section has a curve that extends upwardly and inwardly from the main cut section. The second curved section has a substantially semi-circular curve that extends from the main cut section in a direction towards the bottom edge of the tab and has an end that is substantially perpendicular to and adjacent the main cut section. In one embodiment, the first curved section is dashed.Type: GrantFiled: December 18, 2000Date of Patent: September 10, 2002Assignee: Durabag Co., Inc.Inventors: Daniel C. Huang, Frank F. J. Huang
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Patent number: 6435350Abstract: A pack of self-opening plastic bags adapted for use with a bagging rack. Each plastic bag preferably has an extension portion extending above an open mouth of the bag. At least one bag pack suspension aperture is formed at an upper region of the bag and is adapted for use in suspending the bag pack on a bagging rack. A carrying handle aperture is formed through an upper region of the bag pack. Areas of compression bonds are formed adjacent upper regions of the bag pack, the handle carrying apertures, and/or the suspension aperture.Type: GrantFiled: March 23, 1998Date of Patent: August 20, 2002Assignee: Durabag Co., Inc.Inventors: Frank F. J. Huang, Daniel Huang
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Patent number: 6089514Abstract: A swing-arm bagging rack for use in simultaneously carrying multiple styles of packs of plastic bags. Swing arm bagging rack has a back portion with left and right sides. A first arm portion is attached with first hinges to right side of the back portion and a second and third arm portions are attached via a second hinge to the left side of the back portion. The first and second arm portions are for carrying a first pack of bags and the third arm portion has uprights positioned thereon to carry a second pack of bags. A fourth arm portion is hingedly attached to the front of third arm portion.Type: GrantFiled: September 8, 1998Date of Patent: July 18, 2000Assignee: Durabag Co., Inc.Inventors: Frank Feng Jung Huang, Daniel C. Huang
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Patent number: 5941392Abstract: A slidable bagging rack system. The rack has a slanted back portion which slants downwardly from an upper portion to a lower portion, and has a pair spaced apart support arms with risers which extend above the upper portion of the rack. Spaced midway between the support arms is a hook member. A pack of bags, such as T-shirt bags, is loaded on the rack by pushing the risers through apertures formed in the handles and by pushing the hook member through a mouth tab aperture formed in a mouth tab of the bags. Pulling a front wall of the bag tears the handles free of their handle aperture from the risers and tears the mouth tab of the front wall free, thereby readying the bag for loading with merchandise. The slanted back not only supports the bags, but effectively lowers the level of the open mouth of the bag.Type: GrantFiled: June 24, 1997Date of Patent: August 24, 1999Assignee: Durabag Co., Inc.Inventors: Frank Feng Jung Huang, Daniel Huang
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Patent number: 5938033Abstract: A pack of self-opening plastic T-shirt bags for use with a bagging rack. Each plastic bag in the pack of bags has a mouth tab portion between its two upwardly extending handles, which are at the sides of the mouth of the T-shirt bags. The mouth tab portion is located on the front and rear walls in the mouth region of the plastic bags. The mouth tab portion has an aperture for receiving a retaining projection of a bagging rack. Frangible pressure bonding is formed along the perimeter of said mouth aperture. Flapless handle apertures are also formed in the handles, with frangible pressure bonds formed along their perimeter edges. Due to the frangible bonding formed between adjacent bags, as a frontmost bag is removed from the pack of bags on the bagging rack, the next bag in the pack of bags will automatically self-open into a open position for loading with merchandise.Type: GrantFiled: November 26, 1996Date of Patent: August 17, 1999Assignee: Durabag Co., Inc.Inventors: Frank Feng Jung Huang, Daniel C. Huang
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Patent number: 5865313Abstract: A pack of plastic bags for use with a bagging rack. Each plastic bag in the pack of bags has a central tab portion between its two upwardly extending handles, which are at the sides of the mouth of the T-shirt bags. "J"-shaped slits are formed in the handles for carrying them on a bagging rack. A central tab portion is located on the front and rear walls above the mouth region of the plastic bags. The central tab portion has an aperture for receiving a retaining hook of a bagging rack, and a central tab slit which extends across the central tab portion, except for uncut portions near side edges of the central tab. The tearing cuts pass through the stack of bags and follow a non-straight path. The pack of plastic bags is preferably formed from plastic material which has been exposed to corona surface treatment. Frangible pressure bonding can be formed along the bottom side of said tearing cut to provide a self-opening feature.Type: GrantFiled: May 30, 1997Date of Patent: February 2, 1999Assignee: Durabag Co., Inc.Inventors: Frank Feng Jung Huang, Daniel Huang
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Patent number: 5695064Abstract: A self-opening pack of plastic bags for use with a bagging rack. The pack of plastic bags is formed of plastic material which has been exposed to corona surface treatment. Each plastic bag in the pack of bags has a central tab portion between its two upwardly extending handles, which are at the sides of the mouth of the T-shirt bags. A central tab portion is located on the front and rear walls in the mouth region of the plastic bags. The central tab portion has a neck region and head region. The central tab portion has an aperture for receiving a retaining hook of a bagging rack, and a central tab slit which extends across the central tab portion, except for uncut portions near side edges of the central tab. The tearing cuts pass through the stack of bags and follow a non-straight path. Frangible pressure bonding is formed along the bottom edge of the central tab slit.Type: GrantFiled: November 27, 1995Date of Patent: December 9, 1997Assignee: Durabag Co., Inc.Inventors: Frank Feng Jung Huang, Daniel Huang
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Patent number: 5670013Abstract: Dies are used in forming a pack of self-opening plastic T-shirt bags for use with a bagging rack. Each plastic bag in the pack of bags has a mouth tab portion between its two upwardly extending handles, which are at the sides of the mouth of the T-shirt bags. The mouth tab portion is located on the front and rear walls in the mouth region of the plastic bags. The mouth tab portion has an aperture for receiving a retaining projection of a bagging rack. Frangible pressure bonding is formed along the perimeter of the mouth tab aperture. Flapless handle apertures are also formed in the handles, with frangible pressure bonds formed along their perimeter edges. Due to the frangible bonding formed between adjacent bags, as a frontmost bag is removed from the pack of bags on the bagging rack, the next bag in the pack of bags will automatically self-open into a open position for loading with merchandise.Type: GrantFiled: October 24, 1994Date of Patent: September 23, 1997Assignee: Durabag Co., Inc.Inventors: Frank Feng Jung Huang, Daniel C. Huang