US3762282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for manufacturing bags from thin-walled tubular foil in a continuous process
Assignee: MEULEN LVD
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Filing: 1972-02-22
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Granted: 1973-10-02
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Expires: 1992-02-22
Abstract
Abstract A method and device for manufacturing bags for household refuse, starting from thin-walled synthetic tubular material, in which said material is tensioned upon the periphery of a drum, one or more combined cutting and sealing members being accommodated along said drum periphery.
Inventors
- 👤 Der Meulen L Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:10
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/005; B31B2155/00; B31B2160/00; B31B2160/10; B31B70/02; B31B70/022; B31B70/024
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
A method for the continuous manufacture of bags having a sealed bottom from continuously advanced thin-walled thermoplastic tubular foil, the method comprising the steps of moving a supporting surface at a speed which is at least equal to the advancing velocity of the foil, feeding the tubular foil in the direction of movement of said surface so as to bring the foil into firm contact with said surface, cutting through the tubular foil at regular intervals in a direction transverse to its longitudinal direction of movement and across the entire width of the tube, pushing the trailing end of each cut-off length of the foil towards a pair of cooperative sealing means supported by and lying below said moving surface, and closing said sealing means so as to form a seal in said trailing end.
Claim 2
Independent Claim
135 words
A method for the continuous manufacture of bags having a sealed bottom from continuously advanced thin-walled thermoplastic tubular foil, the method comprising the steps of moving a supporting surface at a speed which is at least equal to the advancing velocity of the foil, feeding the tubular foil in the direction of movement of said surface so as to bring the foil into firm contact with said surface, cutting through the tubular foil at regular intervals in a direction transverse to its longitudinal direction of movement and across the entire width of the tube, pushing the trailing end of each cut-off length of the foil towards a pair of cooperative sealing means supported by and lying below said moving surface, and closing said sealing means so as to form a seal in said trailing end.
Claim 3
Dependent Claim
22 words
A method according to claim 1, comprising cutting said tubular foil with a revolving knife periodically co-operating with the moving supporting surface.
Claim 4
Independent Claim
129 words
A device for manufacturing bags in a continuous process from thin-walled tubular foil, comprising a feeder for the foil, a surface supporting the foil and travelling therewith at a speed at least equal to the feeding speed of the foil, at least one movable cutting means being provided outside said surface, a resilient anvil on the travelling supporting surface adapted to cooperate with said cutting means, and at least one pair of sealing means extending transverse to the direction of travel of the supporting surface, and ahead of said anvil, each pair of said sealing means being countersunk in the travelling supporting surface, and a pusher being positioned near the cutting means adapted to urge the trailing end of the cut-off foil Towards a pair of said sealing means.
Claim 5
Independent Claim
129 words
A device for manufacturing bags in a continuous process from thin-walled tubular foil, comprising a feeder for the foil, a surface supporting the foil and travelling therewith at a speed at least equal to the feeding speed of the foil, at least one movable cutting means being provided outside said surface, a resilient anvil on the travelling supporting surface adapted to cooperate with said cutting means, and at least one pair of sealing means extending transverse to the direction of travel of the supporting surface, and ahead of said anvil, each pair of said sealing means being countersunk in the travelling supporting surface, and a pusher being positioned near the cutting means adapted to urge the trailing end of the cut-off foil Towards a pair of said sealing means.
Claim 6
Dependent Claim
28 words
A device according to claim 3, in which each pair of sealing means consists of two swingable clamping jaws adapted to be moved into openable and closed positions.
Claim 7
Dependent Claim
36 words
A device according to claim 3, comprising a plurality of pressing belts being provided along a part of the path of the travelling supporting surface, said pusher consisting of fingers being movable between the pressing belts.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |