Patent US3684277A successfully refreshed from Google Patents.
US3684277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for braking, overlapping and stacking sheets of material
Assignee: Jagenberg Werke AG
•
Filing: 1970-12-28
•
Granted: 1972-08-15
•
Expires: 1990-12-28
Abstract
Abstract In an apparatus wherein a rotating roll of sheet material is cut into sheets of predetermined size which are advanced, braked, overlapped and stacked, using suction to brake the moving sheets, a special control belt is provided to minimize wear. The control belt is provided with perforations which, upon displacement of the belt, may be registered with openings in the suction box to transmit suction to the belt. The belt has additional holes or channels, alternated with the suction perforations, in which are seated sliding gaskets. The gaskets contact and move along a glide surface but the belt is out of contact with any surface so that the belt is not subject to wear, only the gaskets. If the belt is endless, means are provided to prevent the gaskets from falling out of their positions during the return leg of the belt movement. Means are also provided to prevent slippage between the belt and its drive.
Inventors
- 👤 Gerhard Buschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:41
CPC Classifications
B; B65; B65H; B65H29/00; B65H29/66; B65H29/6609; B65H29/6618; B65H29/6627; B65H29/68; B65H2701/00; B65H2701/10; B65H2701/17; B65H2701/176
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
In an apparatus including means for braking, overlapping and stacking sheets of material such as paper, said braking means operating on the rear ends of said sheets and comprising a suction box having at least one opening, means controlling the transmission of suction from said box to said sheets, and means for actuating said control means, the improvement which comprises making said control means as a belt positioned over and out of contact with a glide surface, said belt being provided with at least one perforation through which suction can be transmitted when in registry with the opening in said suction box, said belt being provided with a channel and with a sliding gasket freely movable in said channel, said sliding gasket being supported on said glide surface and being displaceable with said belt to close off the opening in said suction box.
Claim 2
Dependent Claim
143 words
In an apparatus including means for braking, overlapping and stacking sheets of material such as paper, said braking means operating on the rear ends of said sheets and comprising a suction box having at least one opening, means controlling the transmission of suction from said box to said sheets, and means for actuating said control means, the improvement which comprises making said control means as a belt positioned over and out of contact with a glide surface, said belt being provided with at least one perforation through which suction can be transmitted when in registry with the opening in said suction box, said belt being provided with a channel and with a sliding gasket freely movable in said channel, said sliding gasket being supported on said glide surface and being displaceable with said belt to close off the opening in said suction box.
Claim 3
Dependent Claim
30 words
An apparatus according to claim 1, wherein said gasket is guided in its channel of said belt so as to be vertically but not laterally movable independently of the belt.
Claim 4
Dependent Claim
21 words
An apparatus according to claim 1, wherein the thickness of the sliding gasket is several times that of the control belt.
Claim 5
Dependent Claim
19 words
An apparatus according to claim 1, wherein the sliding gasket is made of a material having low friction properties.
Claim 6
Dependent Claim
54 words
An apparatus according to claim 2, wherein said belt is endless, said apparatus being provided with a plurality of gaskets in a plurality of channels alternated with a plurality of perforations and with guide rails on opposite faces of said belt to prevent said gaskets from falling vertically out of engagement with said belt.
Claim 7
Dependent Claim
35 words
An apparatus according to claim 5, including at least two guide pulleys for said endless belt, said pulleys being provided with grooves into which said gaskets extend during passage of said belt about said pulleys.
Claim 8
Dependent Claim
36 words
An apparatus according to claim 6, wherein said pulleys are provided in said grooves with projections spaced so as to engage successive perforations in said belt to prevent possible slippage between said belt and said pulleys.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |