US3640187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bagmaking machines for making plastics side-fold bags with carrier handles
Assignee: Windmoeller and Hoelscher KG
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Filing: 1970-07-02
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Granted: 1972-02-08
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Expires: 1990-07-02
Abstract
Abstract In a bagmaking machine for making plastic side-fold bags from a stepwise advanced tubular web provided with side folds, the tubular web is cut into lengths, and the bottom seams of the bags are formed by a transverse cutting and welding apparatus. A carrier handle fixing apparatus is controlled such that carrier handles are fed to the leading ends of the cut lengths of tubular web in the opposite direction to the direction of movement thereof and in the plane of movement thereof. The carrier handles are fixed while the cut lengths of tubular web are at a standstill. The finished bags are conveyed by a conveyor. The plane of the conveyor is displaced relative to the plane of conveyance of the cut lengths of tubular web such that discharge of the finished bags is not hindered by the carrier handle-fixing apparatus.
Inventors
- 👤 Friedhelm Mundus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:11
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/86; B31B70/864; B31B2160/00; B31B2160/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
144 words
A bagmaking machine for making plastics side-fold bags from a stepwise advanced tubular web provided with side folds, including a transverse welding and cutting apparatus for cutting the tubular web into lengths and forming the bottom seams of the bags, a carrier handle fixing apparatus which is controlled such that carrier handles are fed to the leading ends of the cut lengths of tubular web in the opposite direction to the direction of movement thereof and in the plane of movement thereof and there are fixed while the cut lengths of tubular web are at a standstill, and a conveyor which continues the conveyance of the finished bags, the plane of the conveyor being displaced relative to the plane of conveyance of the cut lengths of tubular web such that discharge of the finished bags is not hindered by the carrier handle fixing apparatus.
Claim 2
Dependent Claim
144 words
A bagmaking machine for making plastics side-fold bags from a stepwise advanced tubular web provided with side folds, including a transverse welding and cutting apparatus for cutting the tubular web into lengths and forming the bottom seams of the bags, a carrier handle fixing apparatus which is controlled such that carrier handles are fed to the leading ends of the cut lengths of tubular web in the opposite direction to the direction of movement thereof and in the plane of movement thereof and there are fixed while the cut lengths of tubular web are at a standstill, and a conveyor which continues the conveyance of the finished bags, the plane of the conveyor being displaced relative to the plane of conveyance of the cut lengths of tubular web such that discharge of the finished bags is not hindered by the carrier handle fixing apparatus.
Claim 3
Dependent Claim
23 words
A machine according to claim 1 wherein said means is arranged below the plane of movement of the cut lengths of tubular web.
Claim 4
Dependent Claim
50 words
A machine according to claim 1 wherein the carrier handle fixing apparatus is displaceable in the direction of movement of the tubular web relative to the other parts of the bagmaking machine, and a double-belt conveyor which is variable in length is arranged upstream of the carrier handle fixing apparatus.
Claim 5
Dependent Claim
74 words
A machine according to claim 3 wherein, for the purposes of varying its length, the double-belt conveyor is provided with direction-changing rollers which are displaceable in the direction of conveyance at its discharge end and, in the region of its idle runs, with displaceable loop-forming means, the direction-changing rollers being mounted on the frame of the displaceable carrier handle fixing apparatus and the loop-forming means being mounted on the stationary frame of the machine.
Claim 6
Dependent Claim
91 words
A machine according to claim 4 wherein the loop-forming means are displaceable in opposite directions to each other by means of common threaded spindles with a portion having a right-hand thread and a portion having a left-hand thread, and the carrier handle fixing apparatus is also displaceable by means of a threaded spindle, the threaded spindles being connected together by a common adjusting drive and the pitches of the threaded spindles being such that when the carrier handle fixing apparatus is displaced, the belt tension of the double-belt conveyor remains unaltered.
References Cited (Backward Citations)
US3034409A
Cited
US3266053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |