US3747824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signature stitcher interrupter apparatus
Assignee: Boeing North American Inc
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Filing: 1971-07-28
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Granted: 1973-07-24
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Expires: 1991-07-28
Abstract
Abstract In an apparatus for stitching signatures, an interruptable signature stitching means comprising a drive means operatively connected to an interrupting means which is operatively connected to a stitching head means to selectively actuate said stitching head means, said interrupting means being adapted to selectively interrupt the stitching action of said stitching head means when the thickness of said signatures varies from a predetermined value.
Inventors
- 👤 G Linden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:10
CPC Classifications
B; B42; B42B; B42B2/00; B42B2/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
204 words
In a signature stitching apparatus, the combination comprising: a stitcher head mounted for reciprocation between a stitching position and a retracted position; a pivotally-mounted lever having a first arm thereof connected to the stitcher head; drive means for oscillaTing said lever whereby to reciprocate said stitcher head between said positions including a continuously driven crank means; a block member connected to said crank means and having an elongated slot formed therein, said slot being substantially equal in length to the throw of said crank means; a second arm of said lever; a drive pin carried by said second arm and having a sliding fit in said elongated slot; a control member pivotally mounted on said block for movement between a drive position wherein it locks said pin at one end of said slot to thereby transmit the motion of said crank means to said lever and stitcher head and a drive interrupt position wherein it releases said pin for free sliding motion in the elongated slot; sensing means for detecting the presence of an improper signature to be stitched; and, trip means responsive to said sensing means upon the detection of an improper signature for moving said control member to the drive interrupt position.
Claim 2
Dependent Claim
204 words
In a signature stitching apparatus, the combination comprising: a stitcher head mounted for reciprocation between a stitching position and a retracted position; a pivotally-mounted lever having a first arm thereof connected to the stitcher head; drive means for oscillaTing said lever whereby to reciprocate said stitcher head between said positions including a continuously driven crank means; a block member connected to said crank means and having an elongated slot formed therein, said slot being substantially equal in length to the throw of said crank means; a second arm of said lever; a drive pin carried by said second arm and having a sliding fit in said elongated slot; a control member pivotally mounted on said block for movement between a drive position wherein it locks said pin at one end of said slot to thereby transmit the motion of said crank means to said lever and stitcher head and a drive interrupt position wherein it releases said pin for free sliding motion in the elongated slot; sensing means for detecting the presence of an improper signature to be stitched; and, trip means responsive to said sensing means upon the detection of an improper signature for moving said control member to the drive interrupt position.
Claim 3
Dependent Claim
44 words
A signature stitching apparatus as set forth in claim 1 further including resilient spring means connected to the said second arm of said lever for biasing the stitcher head in its retracted position upon movement of said control member to its driven interrupt position.
Claim 4
Dependent Claim
84 words
A signature stitching apparatus as set forth in claim 1 wherein said trip means comprises a cam lever on said control member, a pivotally mounted blocking cam having an inoperative position wherein it is clear of said cam lever and a tripping position wherein it intercepts said cam lever, resilient spring means for biasing the blocking cam to its inoperative position, and means responsive to said sensing means for moving the blocking cam to its tripping position upon the detection of an improper signature.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |