Patent US3702586A successfully refreshed from Google Patents.
US3702586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for switching between automatic and non-automatic master plate feeding and removing operations for offset printing machines
Assignee: Ricoh Co Ltd
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Filing: 1970-09-08
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Granted: 1972-11-14
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Expires: 1990-09-08
Abstract
Abstract A device for switching between automatic and non-automatic master plate feeding and discharging operations, such device being adapted for use with offset printing machines of the type in which an actuation member is operated in steps for causing the printing machines to perform a series of operations required for duplicating a master process. These operations include a master plate feeding operation for feeding a master plate to a master cylinder, an etching operation for applying an ink repellent etching solution to the master plate mounted on the master cylinder, an inking operation for applying ink to the master plate, a copy sheet feeding operation for feeding one copy sheet after another between blanket and impression cylinders, a master plate removal operation for removing the master plate from the master cylinder after completion of duplication, and a blanket cylinder cleaning operation. The device comprises an automatic, non-automatic switching actuation member capable of moving relative to said actuation member. If the actuation member is operated after the switching actuation member is operated, then the master plate feeding and removing operations can be performed automatically.
Inventors
- 👤 Tamaki Kaneko
- 👤 Katsumi Mizuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:00
CPC Classifications
B; B41; B41L; B41L39/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
387 words
An offset printing machine including a master cylinder, means actuable for feeding a master plate to the master cylinder and for etching the plate, means actuable for removing the master plate from the master cylinder, an actuation member having a single handle, means for mounting said actuation member for movement between a neutral position and a first position for actuating the master plate feeding and etching means, and between the neutral position and a second position for actuating the master plate removing means, means including cam means for connecting the actuation member to said means for feeding and etching, and means including cam means for connecting the actuation member to said means for removing, wherein the improvement is in means for selectively moving the actuation member to the first position without actuating the master plate feeding and etching means and for selectively moving the actuation member to the second position without actuating the master plate removing means, for the purpose of allowing manual feeding and etching of a master plate while the actuation member is in its first position and manual removal of the master plate while the actuation member is in its second position, comprising a switching actuation member carried by the actuation member and having a first position for causing actuation of the master plate feeding and etching means when the actuation member is moved from its neutral to its first position wherein said switching actuation member is in driving connection with said feeding and etching cam means, and for causing actuation of the master plate removing means when the actuation member is moved from its neutral to its second position wherein said switching actuation member is in driving connection with the master plate removing means, and having a second position for preventing actuation of the master plate feeding and etching means when the actuation member is moved from its neutral to its first position wherein said switching actuation means is out of driving connection with the master plate feeding and etching means, and for preventing actuation of the master plate removing means when the actuation member is moved to its second position wherein said switching actuation member is out of driving connection with the master plate removing means, and means for biasing the switch actuation member toward one of its first and second positions.
Claim 2
Dependent Claim
387 words
An offset printing machine including a master cylinder, means actuable for feeding a master plate to the master cylinder and for etching the plate, means actuable for removing the master plate from the master cylinder, an actuation member having a single handle, means for mounting said actuation member for movement between a neutral position and a first position for actuating the master plate feeding and etching means, and between the neutral position and a second position for actuating the master plate removing means, means including cam means for connecting the actuation member to said means for feeding and etching, and means including cam means for connecting the actuation member to said means for removing, wherein the improvement is in means for selectively moving the actuation member to the first position without actuating the master plate feeding and etching means and for selectively moving the actuation member to the second position without actuating the master plate removing means, for the purpose of allowing manual feeding and etching of a master plate while the actuation member is in its first position and manual removal of the master plate while the actuation member is in its second position, comprising a switching actuation member carried by the actuation member and having a first position for causing actuation of the master plate feeding and etching means when the actuation member is moved from its neutral to its first position wherein said switching actuation member is in driving connection with said feeding and etching cam means, and for causing actuation of the master plate removing means when the actuation member is moved from its neutral to its second position wherein said switching actuation member is in driving connection with the master plate removing means, and having a second position for preventing actuation of the master plate feeding and etching means when the actuation member is moved from its neutral to its first position wherein said switching actuation means is out of driving connection with the master plate feeding and etching means, and for preventing actuation of the master plate removing means when the actuation member is moved to its second position wherein said switching actuation member is out of driving connection with the master plate removing means, and means for biasing the switch actuation member toward one of its first and second positions.
Claim 3
Dependent Claim
30 words
An offset printing machine as in claim 1 wherein said actuation member comprises a hollow shaft and said switching actuation member comprises a shaft slidably mounted within said hollow shaft.
Claim 4
Dependent Claim
31 words
An offset printing machine as in claim 1 wherein said actuation member comprises a shaft and said switching actuation member comprises a hollow shaft slidably mounted over the actuation member shaft.
Claim 5
Dependent Claim
19 words
An offset printing machine as in claim 1 wherein the switching actuation member is biased towards its second position.
Claim 6
Dependent Claim
43 words
An offset printing machine as in claim 1 including means actuable for inking the master plate mounted on the master cylinder and wherein the actuation member is movable from its first position to a third position for actuating said master plate inking means.
Claim 7
Dependent Claim
48 words
An offset printing machine as in claim 5 wherein the switching actuation member is biased towards its second position and including means for moving the switching actuation member from its second to its first position when the actuation member is moved from its first to its third position.
Claim 8
Dependent Claim
36 words
An offset printing machine as in claim 5 including means actuable for feeding copy sheets and wherein said actuation member is movable from its third to a fourth position for actuating said copy sheet feeding means.
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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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |