US3580141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for paper sacks manufacture
Assignee: Windmoeller and Hoelscher KG
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Filing: 1968-08-21
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Granted: 1971-05-25
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Expires: 1988-08-21
Abstract
Abstract A system of multiple conveyor belts designed to maintain a balance between the output of a tube-forming machine and a bottom-folding machine used in the manufacture of paper, plastic or similar sacks, in which an assemblage of conveyor belts having sufficient capacity for the piles of tubes produced by the tubeformer acts as a magazine upon which the bottom-folder draws as required. Pivoting conveyor belts, directed by suitable monitoring devices, maintain a steady flow into and out of the magazine.
Inventors
- 👤 Herbert Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:09
CPC Classifications
B; B65; B65H; B65H29/00; B65H29/16; B65G; B65G47/00; B65G47/34; B65G47/46; B65G47/51; B65G47/5104; B65G47/515; B65G47/5181; B65G47/52; B65G47/64; B65G47/644; B65G47/645; B65G47/647; B65H29/58; B65H29/60; B65H43/00; B65H43/08; B31; B31B; B31B2150/00; B31B2150/003; B31B50/00; B31B50/60; B31B50/62; B31B50/626; B31B70/00; B31B70/02; B31B70/022; B31B70/04; B31B70/60; B31B70/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
In an apparatus for the production of sacks having a tubeformer, at least one bottom-folder provided with a number or feeding stations and a conveyor arrangement interposed between the tube-former and the bottom-folder for conveying piles of tube sections delivered by the tube-former to the bottom-folder, said conveyor arrangement including a magazine having an entrance end and an exit end, said being adapted to store the piles and comprising a plurality of storing conveyors, the number of which is greater than the number of feeding stations of the bottomfolder, each of said storing conveyors being provided with sensing means determining the occupation situation of the storing conveyors, at least one feed-in conveyor arranged at the entrance end of the magazine and pivotable so as to selectively cooperate with one of the storing conveyors in dependence on the occupation situation thereof, and at least one feed-off conveyor arranged at the exit end of the magazine and pivotable so as to selectively cooperate with one of the storing conveyors in dependence on the occupation situation thereof.
Claim 2
Dependent Claim
174 words
In an apparatus for the production of sacks having a tubeformer, at least one bottom-folder provided with a number or feeding stations and a conveyor arrangement interposed between the tube-former and the bottom-folder for conveying piles of tube sections delivered by the tube-former to the bottom-folder, said conveyor arrangement including a magazine having an entrance end and an exit end, said being adapted to store the piles and comprising a plurality of storing conveyors, the number of which is greater than the number of feeding stations of the bottomfolder, each of said storing conveyors being provided with sensing means determining the occupation situation of the storing conveyors, at least one feed-in conveyor arranged at the entrance end of the magazine and pivotable so as to selectively cooperate with one of the storing conveyors in dependence on the occupation situation thereof, and at least one feed-off conveyor arranged at the exit end of the magazine and pivotable so as to selectively cooperate with one of the storing conveyors in dependence on the occupation situation thereof.
Claim 3
Dependent Claim
20 words
The apparatus according to claim 1, characterized in that associated with the or each feed-in conveyor is a pressure belt.
Claim 4
Dependent Claim
58 words
The apparatus according to claim 1 in which said storing conveyors and said fEed-in and feed-off conveyors provide endless belts and in which at the transfer positions between said feed-in conveyors and said storing conveyors and/or between the latter and, said feed-off conveyors meshing groups of said belts are provided distanced from one another in the transverse direction.
Claim 5
Dependent Claim
23 words
The apparatus according to claim 1, characterized in that the movement of the storing conveyors is controllable by means of the sensing means.
Claim 6
Dependent Claim
33 words
The apparatus according to claim 1, characterized in that the pivoting movement of said feed-in conveyor and/or of said feed-off conveyor isle by means of the sensing means associated with the storing conveyors.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |