US3772968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making draw band closure bags
Assignee: BAGCRAFT CORP
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Filing: 1972-07-21
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Granted: 1973-11-20
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Expires: 1992-07-21
Abstract
Abstract Draw band closure bags are made from pliable sheet material folded and sealed into bag form and provided with tubular lip tunnel formation within which a flat draw band comprising only the flexible sheet material initially connected but partially separated along a longitudinal line along one edge thereof with a strip of material enclosed within the tunnel and separable therefrom when the draw band is pulled through an opening provided by incising or nicking a limited portion of the sheet material at the tunnel. In one embodiment a flexible draw band strip is assembled with the sheet material and enfolded in the tunnel. In another embodiment material of the bag body portion which is to form the mouth end of the bag is initially partially separated along one or more lines parallel to its edge to provide for the draw band and is then enclosed either within a separately formed tunnel-providing folded over piece of flexible material heat-sealed to the bag body, or is enclosed within a tunnel made from the bag body material by folding the same upon itself with the draw band portion on the terminal part of the folded material.
Inventors
- 👤 R Ruda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:16
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/28
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
115 words
A method of making a pliable sheet material bag about the mouth of which is a lip tunnel having therein a draw band adapted to be grasped and pulled out of an opening at an edge of the bag, comprising: preforming a tunnel opening area in pliable sheet material; partially separating a draw band strip of flat sheet material along a longitudinal line along one edge thereof with respect to an inteGral strip of material; placing said draw band strip in laminar relation to said pliable sheet material having the opening area preformed therein and with the draw band strip extending across said opening area; and shaping a tunnel formation about said draw band strip.
Claim 2
Independent Claim
115 words
A method of making a pliable sheet material bag about the mouth of which is a lip tunnel having therein a draw band adapted to be grasped and pulled out of an opening at an edge of the bag, comprising: preforming a tunnel opening area in pliable sheet material; partially separating a draw band strip of flat sheet material along a longitudinal line along one edge thereof with respect to an inteGral strip of material; placing said draw band strip in laminar relation to said pliable sheet material having the opening area preformed therein and with the draw band strip extending across said opening area; and shaping a tunnel formation about said draw band strip.
Claim 3
Dependent Claim
42 words
A method according to claim 1, comprising supplying said draw band strip and the partially separated integral strip from a roll to provide separable oppositely drawable draw bands, and securing respectively opposite ends of the separable draw bands strips to the bag.
Claim 4
Dependent Claim
35 words
A method according to claim 1, comprising supplying the pliable sheet material from a continuous web, and severing the bag from the web across said opening area to provide tunnel openings in two succeeding bags.
Claim 5
Dependent Claim
107 words
A method according to claim 1, comprising at least partially separating tunnel opening areas at longitudinally spaced relatively off-set locations in the lip tunnel portion of a bag sheet material web, assembling the draw band material as a pair of coextensive partially severed contiguous sections with said lip tunnel portion and respectively aligned with said spaced areas, forming the web into bag condition, severing the bag from the web along side edges in line with the respective opening areas, and respectively securing said draw band sections to the wall panels at the side edge opposite to the area with which the respective draw bands sections are aligned.
Claim 6
Independent Claim
117 words
A method of making a pliable sheet material bag about the mouth of which is a lip tunnel having therein a draw band adapted to be grasped and pulled out of an opening at a side edge of the bag, comprising supplying pliable sheet material from a continuous web; enclosing a draw band strip of flat sheet material partially separated from a contiguous coextensive strip of material within a tunnel formation along a marginal portion of said sheet material web and across a tunnel opening area in said formation; and forming the web into bag wall relation with said opening area and a manipulating portion of said draw band strip at a side edge of the bag.
Claim 7
Independent Claim
117 words
A method of making a pliable sheet material bag about the mouth of which is a lip tunnel having therein a draw band adapted to be grasped and pulled out of an opening at a side edge of the bag, comprising supplying pliable sheet material from a continuous web; enclosing a draw band strip of flat sheet material partially separated from a contiguous coextensive strip of material within a tunnel formation along a marginal portion of said sheet material web and across a tunnel opening area in said formation; and forming the web into bag wall relation with said opening area and a manipulating portion of said draw band strip at a side edge of the bag.
Claim 8
Dependent Claim
29 words
A method according to claim 5, comprising assembling said draw band strip and a contiguous coextensive strip of material as a separate strip of material into said tunnel formation.
Claim 9
Dependent Claim
29 words
A method according to claim 1, comprising effecting the partial separation of said draw band material as an integral section of said sheet material comprising a bag body member.
Claim 10
Dependent Claim
24 words
A method according to claim 7, comprising enfolding a separate piece of material about the partially separated draw band material to provide the tunnel.
Claim 11
Dependent Claim
28 words
A method according to claim 7, comprising enfolding the partially severed draw band material in an integral fold portion of the body member material to provide the tunnel.
Claim 12
Dependent Claim
79 words
A method according to claim 1, comprising severing the bag from a continuous line-produced assembly, including: providing sections of the tunnel formations and the draw band strip in transversely spaced longitudinal portions of a plastic sheet web of the pliable sheet material, forming the bag by bringing the sections into confronting relation at mouth-providing portion of the assembly, and severing the bag from the assembly along a transverse line and effecting sealing of the bag at a side seam.
Claim 13
Dependent Claim
35 words
A method according to claim 6, comprising forming a line of partial separation along the marginal portion of said sheet material web to provide said draw band strip and the contiguous coextensive strip of material.
Claim 14
Dependent Claim
34 words
A method according to claim 11, comprising providing a separate strip of material and shaping the separate strip of material into the tunnel formation enclosing said draw band strip and coextensive strip of material.
Claim 15
Dependent Claim
31 words
A method according to claim 11, comprising folding a portion of said sheet material web about said draw band strip and the contiguous strip of material to provide said tunnel formation.
Claim 16
Independent Claim
147 words
A method of making a pliable sheet material bag about the mouth Of which is a lip tunnel having therein a pair of draw bands adapted to be grasped and pulled out of openings at respective opposite side edges of the bag, comprising: = at least partially separating tunnel opening areas at longitudinally spaced relatively off-set locations in the lip tunnel portion of a bag sheet material web; enclosing the draw band material as a pair of coextensive partially separated continguous sections within a lip tunnel formation and respectively aligned with said spaced opening areas; forming the web into bag condition; severing the bag from the web along side edges in line with the respective opening areas; and respectively securing said draw band sections to the lip tunnel portion at the bag side edge opposite to the area with which each respective draw band section is aligned.
Claim 17
Independent Claim
147 words
A method of making a pliable sheet material bag about the mouth Of which is a lip tunnel having therein a pair of draw bands adapted to be grasped and pulled out of openings at respective opposite side edges of the bag, comprising: = at least partially separating tunnel opening areas at longitudinally spaced relatively off-set locations in the lip tunnel portion of a bag sheet material web; enclosing the draw band material as a pair of coextensive partially separated continguous sections within a lip tunnel formation and respectively aligned with said spaced opening areas; forming the web into bag condition; severing the bag from the web along side edges in line with the respective opening areas; and respectively securing said draw band sections to the lip tunnel portion at the bag side edge opposite to the area with which each respective draw band section is aligned.
Claim 18
Independent Claim
116 words
A method of making a pliable sheet material bag about the mouth of which is a lip tunnel having therein a draw band adapted to be grasped and pulled out of an opening in the tunnel, comprising: partially separating a longitudinal integral strip of a bag body member along a line whereby the section is connected by spaced tear connections with an integral portion of the body member to provide a draw band that can be separated from the integral body portion by pulling longitudinally on the draw band; enfolding a tunnel formation about said integral portion of the body member and said draw band; and securing the enfolded formation in place on the body member.
Claim 19
Independent Claim
116 words
A method of making a pliable sheet material bag about the mouth of which is a lip tunnel having therein a draw band adapted to be grasped and pulled out of an opening in the tunnel, comprising: partially separating a longitudinal integral strip of a bag body member along a line whereby the section is connected by spaced tear connections with an integral portion of the body member to provide a draw band that can be separated from the integral body portion by pulling longitudinally on the draw band; enfolding a tunnel formation about said integral portion of the body member and said draw band; and securing the enfolded formation in place on the body member.
Claim 20
Dependent Claim
33 words
A method according to claim 15, comprising enfolding and securing a separate piece of material about said integral portion of the body member and said draw band section to provide said tunnel formation.
Claim 21
Dependent Claim
27 words
A method according to claim 15, comprising enfolding the draw band section in an integral fold portion of said body member and thereby providing the tunnel formation.
Claim 22
Dependent Claim
94 words
A method according to claim 15, comprising severing said bag from a continuous line-produced assembly including providing the draw band section and integral portion of the body member on respective transversely spaced longitudinal portions of a plastic sheet strip, effecting said enfolding of tunnel formation about each of said portions of the sheet strip, forming the bag by bringing said portions into confronting relation with the tunnel formations aligned at a bag mouth, severing the bag from the sheet strip along a transverse line, and effecting sealing of the bag at a side seam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |