US3720141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making thermoplastic handle bags
Assignee: FMC Corp
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Filing: 1970-04-08
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Granted: 1973-03-13
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Expires: 1990-04-08
Abstract
Abstract This application discloses a bag machine adapted to form handle bags from a thermoplastic web material. The handle bags are made with a reinforced mouth comprising two or more layers of web which are of sufficient width so that hand receiving cut-outs can be formed therein. A bat of this form can be securely and easily grasped by one hand and the multi-layered web provides sufficient strength to prevent tearing of the bag about the cut-outs.
Inventors
- 👤 D Stock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:22
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/74; B29C65/745; B29C65/7461; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/305; B29C65/749; B29C66/00; B29C66/005; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81415; B29C66/81417; B29C66/81427; B29C66/816; B29C66/8161; B29C66/82; B29C66/822; B29C66/8221; B29C66/8226; B29C66/83; B29C66/832; B29C66/8322; B29C66/83221; B29C66/84; B29C66/843; B29C2793/00; B29C2793/0009; B29C2793/0018; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/81421; B29C66/81422; B29L; B29L2031/00; B29L2031/46; B29L2031/463; B29L2031/712; B29L2031/7128; B31; B31B; B31B70/00; B31B70/14; B31B70/60; B31B70/64; B31B70/642; B31B70/74; B31B70/86; B31B70/876; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1313
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
87 words
An apparatus for making handle bags from a thermoplastic web which is folded along its longitudinal median so that the margins of the web are even, said apparatus comprising means for folding each of the web margins to produce a lip having at least two web layers, and means for simultaneously making aligned cut-outs and a plurality of line seals in each lip, said seals running longitudinally of the cut-outs and straddling the cut-outs, and means for transversely severing and sealing the web to complete the bag.
Claim 2
Independent Claim
87 words
An apparatus for making handle bags from a thermoplastic web which is folded along its longitudinal median so that the margins of the web are even, said apparatus comprising means for folding each of the web margins to produce a lip having at least two web layers, and means for simultaneously making aligned cut-outs and a plurality of line seals in each lip, said seals running longitudinally of the cut-outs and straddling the cut-outs, and means for transversely severing and sealing the web to complete the bag.
Claim 3
Independent Claim
87 words
An apparatus for making handle bags from a thermoplastic web which is folded along its longitudinal median so that the margins of the web are even, said apparatus comprising means for folding each of the web margins to produce a lip having at least two web layers, and means for simultaneously making aligned cut-outs and a plurality of line seals in each lip, said seals running longitudinally of the cut-outs and straddling the cut-outs, and means for transversely severing and sealing the web to complete the bag.
Claim 4
Independent Claim
87 words
An apparatus for making handle bags from a thermoplastic web which is folded along its longitudinal median so that the margins of the web are even, said apparatus comprising means for folding each of the web margins to produce a lip having at least two web layers, and means for simultaneously making aligned cut-outs and a plurality of line seals in each lip, said seals running longitudinally of the cut-outs and straddling the cut-outs, and means for transversely severing and sealing the web to complete the bag.
Claim 5
Dependent Claim
48 words
The apparatus of claim 1 wherein said means for making the cut-outs and line seals comprises platens reciprocable toward and away from each other, means directly actuating one of the platens for reciprocation, and means responsive to the reciprocation of said one platen for reciprocating the other platen.
Claim 6
Dependent Claim
75 words
The apparatus of claim 2 wherein said means for reciprocating said other platen comprises centrally pivotally mounted rocker arms, a slidably mounted plunger connected to said one platen, a slidably mounted plunger connected to said other platen, and means on said plungers engageable with said rocker arms to cause rocking of said arms when said plunger of said one platen is reciprocated which causes concurrent oppositely directed reciprocation of said plunger of said other platen.
Claim 7
Independent Claim
95 words
An apparatus for simultaneously making hand-receiving cut-outs and line seals in a web folded along its longitudinal median and having each of its ends folded to produce a multi-layered band; said apparatus comprising means for laterally separating and supporting longitudinal portions of said bands; stationary sealing and cutting means located between said separating and supporting means; platens, mounted for reciprocation toward and away from each other, for firmly pressing the separated bands in contact with said sealing and cutting means to make reinforcing line seals and the hand-receiving cut-outs in each of the separated bands.
Claim 8
Independent Claim
95 words
An apparatus for simultaneously making hand-receiving cut-outs and line seals in a web folded along its longitudinal median and having each of its ends folded to produce a multi-layered band; said apparatus comprising means for laterally separating and supporting longitudinal portions of said bands; stationary sealing and cutting means located between said separating and supporting means; platens, mounted for reciprocation toward and away from each other, for firmly pressing the separated bands in contact with said sealing and cutting means to make reinforcing line seals and the hand-receiving cut-outs in each of the separated bands.
Claim 9
Dependent Claim
84 words
The apparatus of claim 4 wherein said separating means comprises generally rectangular plates, said plates being mounted for limited movement toward and away from each other, slots in said plates providing clearance openings for said sealing and cutting means to project therethrough, and springs for holding the plates away from each other, said plates being moved toward each other during movement of said platens toward said sealing and cutting means to thereby firmly clamp the folded ends of the web during cutting and sealing.
Claim 10
Independent Claim
133 words
An apparatus for making handle bags associated with a bag machine having means for counting the number of bag machine cycles to produce counted bag stacks and said counting means operative to interrupt bag machine operation for at least one bag making cycle at the end of the count; said handle bag making apparatus comprising opposed platens reciprocable toward each other for making line seals and cut-outs in the folded edges of a thermoplastic web; stationary seal bars and a cutting die located between said platens; means mounting said seal bars and cutting die for pivotal movement away from the path of the web; and means, responsive to interruption of bag machine operation for at least one bag making cycle, for pivoting said seal bars and cutting die away from the web path.
Claim 11
Independent Claim
133 words
An apparatus for making handle bags associated with a bag machine having means for counting the number of bag machine cycles to produce counted bag stacks and said counting means operative to interrupt bag machine operation for at least one bag making cycle at the end of the count; said handle bag making apparatus comprising opposed platens reciprocable toward each other for making line seals and cut-outs in the folded edges of a thermoplastic web; stationary seal bars and a cutting die located between said platens; means mounting said seal bars and cutting die for pivotal movement away from the path of the web; and means, responsive to interruption of bag machine operation for at least one bag making cycle, for pivoting said seal bars and cutting die away from the web path.
Claim 12
Dependent Claim
20 words
The apparatus according to claim 6 further comprising means for preventing reciprocable movement of said platens during an interrupt cycle.
Claim 13
Dependent Claim
16 words
The apparatus according to claim 6 further comprising means for disposing of the cut-out web portion.
Claim 14
Dependent Claim
17 words
The apparatus according to claim 7 wherein said means for preventing reciprocation comprises a fluid operated cylinder.
Claim 15
Dependent Claim
22 words
The apparatus according to claim 6 comprising a vacuum system for removing thE cut-out portions of the web as they are produced.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |