US3829702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and arrangement for checking the alignment of a paper sheet in paper sheet feed apparatus
Assignee: PRINTING EQUIPMENT AB
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Filing: 1972-09-27
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Granted: 1974-08-13
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Expires: 1992-09-27
Abstract
Abstract A method and an arrangement for controlling the alignment of paper sheets in a feed apparatus for printing presses or the like with a photocell arranged on the underside of a sheet retarding hook with a hole therethrough whereby the signal from the photocell is produced when the paper sheet occupies its correct position in the sheet retarding hook.
Inventors
- 👤 A Eriksson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:59
CPC Classifications
B; B65; B65H; B65H9/00; B65H9/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
An arrangement for checking the alignment of a paper sheet in paper sheet feed apparatus of a paper processing machine having front markers; at least one movable paper sheet retarding hook having a Jshaped configuration defining a paper receiving slot; a feed table and means for detecting the position of the paper sheet photoelectrically; said photoelectric means being fixedly secured to the underside of the paper sheet retarding hook and movable therewith; said hook having an opening communicating with said slot and said photoelectric means producing a signal responsive to the light reflected from the paper when it arrives in the retarding hook slot in the correct position.
Claim 2
Dependent Claim
108 words
An arrangement for checking the alignment of a paper sheet in paper sheet feed apparatus of a paper processing machine having front markers; at least one movable paper sheet retarding hook having a Jshaped configuration defining a paper receiving slot; a feed table and means for detecting the position of the paper sheet photoelectrically; said photoelectric means being fixedly secured to the underside of the paper sheet retarding hook and movable therewith; said hook having an opening communicating with said slot and said photoelectric means producing a signal responsive to the light reflected from the paper when it arrives in the retarding hook slot in the correct position.
Claim 3
Dependent Claim
129 words
The apparatus of claim 1 wherein said photoelectric means comprises a holder containing a photocell and a lamp for producing the signal in the photocell; said holder having an outlet for passing light from the lamp toward said hook and having an inlet for passing light reflected from the paper sheet toward said photocell; the light from the lamp being reflected from the paper sheet and passing through said inlet when the paper sheet is correctly positioned within said slot; the upper portion of the paper sheet retarding hook having an obliquely and downwardly extending surface forming the base of said opening and arranged to reflect light passing through said outlet away from said inlet in the absence of a paper sheet in the paper retarding hook receiving slot.
Claim 4
Dependent Claim
40 words
The apparatus of claim 1 wherein the hook is movable downstream to a position beyond the front markers to position the paper feed into the hook and movable beneath the feed table and then upstream to the paper receiving position.
Claim 5
Independent Claim
135 words
A method of checking the alignment of a paper sheet feed apparatus for feeding sheets of paper at high speeds in a paper processing machine, comprising the steps of: sequentially moving sheets of paper along a surface in a first direction at high speed; maintaining at a first position a retarding member having a hook-shaped projection positioned in the path of movement of said paper sheet, said hook-shaped projection having an opening; directing light toward said opening; detecting light reflecting from the sheet of paper when the leading edge of the sheet is positioned upon said opening to indicate proper positioning of the sheet; moving the retarding member and the properly positioned sheet at high speed toward a stationary hook-shaped member, located at a second position along said surface, only upon detection of reflected light.
Claim 6
Independent Claim
135 words
A method of checking the alignment of a paper sheet feed apparatus for feeding sheets of paper at high speeds in a paper processing machine, comprising the steps of: sequentially moving sheets of paper along a surface in a first direction at high speed; maintaining at a first position a retarding member having a hook-shaped projection positioned in the path of movement of said paper sheet, said hook-shaped projection having an opening; directing light toward said opening; detecting light reflecting from the sheet of paper when the leading edge of the sheet is positioned upon said opening to indicate proper positioning of the sheet; moving the retarding member and the properly positioned sheet at high speed toward a stationary hook-shaped member, located at a second position along said surface, only upon detection of reflected light.
Claim 7
Dependent Claim
39 words
The method of claim 4 further comprising the steps of: moving said retarding member beyond the second position occupied by the stationary hook-shaped member, said sheet being restrained from moving beyond said second position by said stationary hook-shaped member.
Claim 8
Dependent Claim
95 words
The method of claim 5 further comprising the steps of: moving the retarding member away from said surface after passing said second position to move the hook-shaped projection of the retarding member out of the path of movement of paper sheets; and then moving the retarding member back toward said first position to place the hook-shaped projection in the path of movement of the next paper sheet to be received, said retarding member being moved at a rate sufficient to enable it to return to the first position before receipt of the next paper sheet.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |