US3766857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saddle lock-up for flexible printing plates
Assignee: Hercules LLC
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Filing: 1972-10-17
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Granted: 1973-10-23
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Expires: 1992-10-17
Abstract
Abstract The invention is a flexible printing plate saddle lock-up which is operable either on-press or off-press and which provides means to maintain tension in the flexible plate to prevent shifting and buckling of the plate which would result in poor print quality. The saddle lock-up has a rotatable securing bar to which the flexible plate is attached, said rotatable bar being spring biased to uniformly tension said plate, said rotatable bar being secured in locked position by a spring loaded pin and complimentary opening in said bar.
Inventors
- 👤 H Schlatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:21
CPC Classifications
B; B41; B41F; B41F27/00; B41F27/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
170 words
A saddle lock-up for flexible printing plates comprising: a. semi-cylindrical saddle means having a leading edge and a trailing edge and adapted to be locked to a printing press cylinder; b. a bar slideably connected to said trailing edge to move toward and away from said trailing edge in a generally circumferential direction, said bar being rotatable about its longitudinal axis between a non-printing position for mounting A flexible plate and a printing position, said bar having a first securing means for holding one end of a flexible printing plate; c. a second securing means connected to said leading edge to secure the other end of a flexible printing plate; d. releasable locking means interlocking said trailing edge and said bar against rotation in the printing position; and e. resilient means interposed between said bar and said trailing edge, said resilient means being compressed when said bar is rotated to the printing position to bias said bar away from said trailing edge and thereby uniformly tension a flexible printing plate.
Claim 2
Dependent Claim
170 words
A saddle lock-up for flexible printing plates comprising: a. semi-cylindrical saddle means having a leading edge and a trailing edge and adapted to be locked to a printing press cylinder; b. a bar slideably connected to said trailing edge to move toward and away from said trailing edge in a generally circumferential direction, said bar being rotatable about its longitudinal axis between a non-printing position for mounting A flexible plate and a printing position, said bar having a first securing means for holding one end of a flexible printing plate; c. a second securing means connected to said leading edge to secure the other end of a flexible printing plate; d. releasable locking means interlocking said trailing edge and said bar against rotation in the printing position; and e. resilient means interposed between said bar and said trailing edge, said resilient means being compressed when said bar is rotated to the printing position to bias said bar away from said trailing edge and thereby uniformly tension a flexible printing plate.
Claim 3
Dependent Claim
37 words
A device as in claim 1 wherein said locking means includes a spring biased pin in said trailing edge and a complementary opening through said bar said pin being positioned in said opening in the printing position.
Claim 4
Dependent Claim
24 words
A device as in claim 2 wherein said first and second securing means comprise pins over which a flexible printing plate may be impaled.
Claim 5
Dependent Claim
27 words
A device as in claim 2 wherein said first and second securing means comprise slots into which the ends of a flexible printing plate may be inserted.
Claim 6
Dependent Claim
26 words
A device as in claim 2 wherein said first and second securing means comprise wedge shaped members over which a flexible printing plate may be clipped.
References Cited (Backward Citations)
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US2730949A
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US3696744A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |