US3754755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for registering sheets on feed board of sheet fed printing machines
Assignee: Roland Offsetmaschinenfabrik Faber and Schleicher AG
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Filing: 1972-07-24
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Granted: 1973-08-28
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Expires: 1992-07-24
Abstract
Abstract A sheet registering arrangement for positioning sheets on a feed board prior to take-off and transfer to a printing unit. Seated engagement of the leading edge of a sheet with front guide means is maintained during register with a side guide member in the form of a short length of fence by pivotally mounting the side guide member so that it is free to swivel into self-alignment with the lateral edge of the sheet. Thus, non-square sheets can be reproducibly registered. Light biasing of the side guide member by means of springs or the like can be used to place the member in a neutral position, when no sheet is present. The neutral position can be made adjustable so as to accommodate sheets with different characteristic angular errors.
Inventors
- 👤 K Krochert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:52
CPC Classifications
B; B65; B65H; B65H9/00; B65H9/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
273 words
A sheet registering arrangement for positioning sheets prior to take-off and transfer to a printing unit, comprising a feed board, extensive front guide means located in obstructing transfer alignment at the front edge of the board for registering the leading edge of the sheets, a side guide member located at one side of said feed board for registering the side edge of the sheets, means for feeding sheets one by one onto the feed board along a path which clears the side guide member by a relatively small amount of clearance and into seated engagement with the front guide means, means adjacent the side guide member and synchronized with the arrival of the sheet at the front guide means for urging the sheet laterally into engagement with the side guide member, the side guide member being in the form of a short lengtH of fence presenting a vertical sheet engaging face which extends both upwardly and downwardly a short distance with respect to the surface of the feed board, and means including a vertically extending pivot at the central portion of the guide member and upon which the guide member is free to swivel so that when the presented edge of a sheet being in angular error is urged laterally into engagement with the side guide member the side guide member is thereby swiveled into self-alignment with such edge with no tendency to dislodge the sheet away from its seated engagement with the front guide means, and means for thereafter gripping the registered sheet and for retracting the front guide means for transfer of the sheet in registered condition to the printing unit.
Claim 2
Dependent Claim
273 words
A sheet registering arrangement for positioning sheets prior to take-off and transfer to a printing unit, comprising a feed board, extensive front guide means located in obstructing transfer alignment at the front edge of the board for registering the leading edge of the sheets, a side guide member located at one side of said feed board for registering the side edge of the sheets, means for feeding sheets one by one onto the feed board along a path which clears the side guide member by a relatively small amount of clearance and into seated engagement with the front guide means, means adjacent the side guide member and synchronized with the arrival of the sheet at the front guide means for urging the sheet laterally into engagement with the side guide member, the side guide member being in the form of a short lengtH of fence presenting a vertical sheet engaging face which extends both upwardly and downwardly a short distance with respect to the surface of the feed board, and means including a vertically extending pivot at the central portion of the guide member and upon which the guide member is free to swivel so that when the presented edge of a sheet being in angular error is urged laterally into engagement with the side guide member the side guide member is thereby swiveled into self-alignment with such edge with no tendency to dislodge the sheet away from its seated engagement with the front guide means, and means for thereafter gripping the registered sheet and for retracting the front guide means for transfer of the sheet in registered condition to the printing unit.
Claim 3
Dependent Claim
30 words
The combination as claimed in claim 1 in which stops are provided for limiting the range of swiveling movement to a few degrees on each side of a neutral position.
Claim 4
Dependent Claim
54 words
The combination as claimed in claim 1 in which centering means are provided for lightly biasing the side guide member into a neutral position, the biasing force being sufficiently light so as to be readily overcome by the edge of a sheet being in angular error under the action of the lateral urging means.
Claim 5
Dependent Claim
37 words
The combination as claimed in claim 1 in which the centering means is adjustable so as to vary the neutral position in accordance with the angular error which may be characteristic of a given batch of sheets.
Claim 6
Dependent Claim
17 words
The combination as claimed in claim 3 in which the centering means includes a light coil spring.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |