US3566754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plant for making bags
Assignee: Windmoeller and Hoelscher KG
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Filing: 1968-05-16
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Granted: 1971-03-02
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Expires: 1988-05-16
Abstract
Abstract The plant comprises a tube-making machine, a station for forming stacks from the tube sections made by the tube-making machine, a conveyor and a distributor for delivering the stacks to preferably two or more end-laying machines, and a device for removing the stacks of bags made by the end-laying machines. A storage device is disposed between the stack-forming device and the distributing station and serves to receive the stacks of tube sections and to deliver them to the distributing station as required, automatically and independently of the delivery speed and delivery timing of the stack-forming device.
Inventors
- 👤 Willi Stork
- 👤 Walter Franke
- 👤 Ewald Fischer
- 👤 Karl Haupt
- 👤 Werner Hassman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:35
CPC Classifications
B; B65; B65G; B65G43/00; B65G43/10; B31; B31B; B31B2150/00; B31B2150/001; B31B2150/003; B31B2160/00; B31B2160/20; B31B70/00; B31B70/02; B31B70/74; B31B70/92; B31B70/98
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
107 words
In a plant for making bags, comprising a tube-making machine and at least two end-forming machines, the improvement comprising means for forming stacks from the tube sections made by said tube-making machine, conveying and distributing means for delivering said stacks of tube sections to said end-forming machines, storage means disposed between said stack-forming means and said conveying and distributing means and adapted to receive said stacks of tube sections and to deliver them to said conveying and distributing means as required, automatically and independently of the delivery speed and delivery timing of said stack-forming means, and means to remove stacks of bags made by said end-forming machines.
Claim 2
Dependent Claim
107 words
In a plant for making bags, comprising a tube-making machine and at least two end-forming machines, the improvement comprising means for forming stacks from the tube sections made by said tube-making machine, conveying and distributing means for delivering said stacks of tube sections to said end-forming machines, storage means disposed between said stack-forming means and said conveying and distributing means and adapted to receive said stacks of tube sections and to deliver them to said conveying and distributing means as required, automatically and independently of the delivery speed and delivery timing of said stack-forming means, and means to remove stacks of bags made by said end-forming machines.
Claim 3
Dependent Claim
88 words
The improvement of claim 1, wherein said storage means comprises at least three stack-conveying belts arranged one behind the other and means to drive said stack-conveying belts independently of each other, the first one of said stack-conveying belts comprising means responsive to the discharge of stacks from said stack-forming means and adapted to cause operation of said drive means for said first stack-conveying belt, and the last one of said stack-conveying belts being adapted to be driven in response to delivery commands from said conveying and distributing means.
Claim 4
Dependent Claim
73 words
The improvement of claim 2, wherein said drive means comprise a plurality of motors adapted to be energized and deenergized by photoelectric sensing means (F 1 to F 6), positioned at the transfer points between the delivery conveyor belt (17) of the stack-forming device and the first conveyor belt (A) of the storage device (18), between successive conveyor belts (A- E), and between the last conveyor belt (E) and the distributing station (19).
Claim 5
Dependent Claim
37 words
The improvement Of claim 3, wherein the motors for driving the stack-conveying belts arranged upstream of the last stack-conveying belt are each adapted to be blocked as long as there are stacks on the succeeding stack-conveying belt.
Claim 6
Dependent Claim
91 words
The improvement of claim 3, wherein said photoelectric sensing means are responsive to a dark signal or a bright signal caused by the presence and absence, respectively, of one of said stacks of tube sections in the region of said sensing means, and wherein the dark signals from each photoelectric sensing means (F 1- F 6) disposed between two conveyor belts (17, A-E) energize the means for driving the conveyor belts disposed on opposite sides of the sensed transfer point and that said means are deenergized by the subsequent bright signal.
Claim 7
Dependent Claim
83 words
A plant according to claim 5, characterized in that the motor for driving the last conveyor belt is energized by a dark signal from the photoelectric sensing means disposed between the next to last and last conveyor belts and by a bright signal from the photoelectric sensing means disposed between the last conveyor belt and the distributing station and is deenergizable by the dark signal from the latter photoelectric sensing means and is also energizable by a delivery command from the distributing station.
Claim 8
Dependent Claim
46 words
A plant according to claim 6, characterized in that the dark signal from the photoelectric sensing means between the next to last and last conveyor belts is blocked by the dark signal from the photoelectric sensing means between the last conveyor belt and the distributing station.
Claim 9
Dependent Claim
31 words
A plant according to claim 7, characterized in that the blocking is maintained by a delay element during short-time bright signals of the photoelectric sensing means succeeding the last conveyor belt.
Claim 10
Dependent Claim
39 words
A plant according to claim 5, characterized in that an audible and/or visual signal is generated in response to the coincidence of dark signals from a predetermined number of photoelectric sensing means disposed at transfer points between conveyor belts.
Claim 11
Dependent Claim
40 words
A plant according to claim 5, characterized in that the tube-making machine is adapted to be automatically deenergized in response to the coincidence of dark signals from a predetermined number of photoelectric sensing means at transfer points between belt conveyors.
Claim 12
Dependent Claim
165 words
In a plant for making bags, comprising a tube-making machine and at least two end-forming machines, the improvement comprising means for forming stacks from the tube sections made by said tube-making machine, conveying and distributing means for delivering said stacks of tube sections to said end-forming machines, means to remove stacks of bags made by said end-forming machines, and means for changing the direction of travel of stacks by 90*, said direction changing means comprising a series of parallel, spaced apart rollers which are disposed in a horizontal plane and adapted to be driven their peripheral direction, and a plurality of parallel, revolving, endless conveyors (71), which extend through the spaces between the rollers, the rollers and the endless conveyors being vertically adjustable relative to each other in such a manner that the supporting surface for the stacks (8) is selectively formed either by the surface of the upper course of the conveyors or by the top parts of the peripheral surfaces of the rollers.
Claim 13
Dependent Claim
165 words
In a plant for making bags, comprising a tube-making machine and at least two end-forming machines, the improvement comprising means for forming stacks from the tube sections made by said tube-making machine, conveying and distributing means for delivering said stacks of tube sections to said end-forming machines, means to remove stacks of bags made by said end-forming machines, and means for changing the direction of travel of stacks by 90*, said direction changing means comprising a series of parallel, spaced apart rollers which are disposed in a horizontal plane and adapted to be driven their peripheral direction, and a plurality of parallel, revolving, endless conveyors (71), which extend through the spaces between the rollers, the rollers and the endless conveyors being vertically adjustable relative to each other in such a manner that the supporting surface for the stacks (8) is selectively formed either by the surface of the upper course of the conveyors or by the top parts of the peripheral surfaces of the rollers.
Claim 14
Dependent Claim
18 words
A plant according to claim 11, characterized in that the endless conveyors consist of conveyor belts, preferably V-belts.
Claim 15
Dependent Claim
35 words
A plant according to claim 11, characterized in that the stack-forming station includes means for changing the direction of travel in order to reject stacks having tube sections which are defective or to be checked.
Claim 16
Dependent Claim
21 words
A plant according to claim 11, characterized in that the distributing station is formed by means for changing direction of travel.
Claim 17
Dependent Claim
37 words
A plant according to claim 14, characterized in that the conveyors for conveying in the changed direction are adapted to be driven in both directions and end-forming machines are disposed on both sides of the distributing station.
Claim 18
Dependent Claim
77 words
A plant according to claim 14, characterized in that the conveyors for forwarding to the end-forming machine or machines consist of rollers, and transfer rakes are provided, which serve to transfer the stacks of tube sections to the feeders of the end-forming machines and comprise lifting bars which extend between the rollers and for a transfer are adapted to be raised above the rollers and moved transversely to the direction of the travel imparted by the rollers.
Claim 19
Dependent Claim
27 words
A plant according to claim 1, characterized in that the stack-forming station comprises lattice conveyors for compacting the loose stacks of workpieces formed on collecting conveyor belts.
Claim 20
Dependent Claim
52 words
A plant according to claim 1, characterized in that the double delivery means of the end-forming machines are succeeded by conveyor belts, which enable a pivotal movement of their plane of conveyance about their rear reversing pulley so as to combine the stacks of tube sections in a common plane of conveyance.
References Cited (Backward Citations)
US3374714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |