Patent US4334758A successfully refreshed from Google Patents.
US4334758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate processor
Assignee: Polychrome Corp
•
Filing: 1981-04-10
•
Granted: 1982-06-15
•
Expires: 2001-04-10
Abstract
Abstract An improved apparatus for developing offset printing plates is disclosed, in which the soaker plates defining the developing chamber between them comprise textured stainless steel and are oriented at an angle to the horizontal, their upstream ends being higher than their downstream ends.
Inventors
- 👤 Joseph Leveille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:51
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/3042
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
151 words
An apparatus for developing offset printing plates, said apparatus comprising: a developing station including two parallel soaker plates, made of textured stainless steel, defining a developing chamber between them, said soaker plates each having an upstream end and a downstream end and being inclined at a predetermined angle to the horizontal, said upstream end of each said soaker plate being higher than said downstream end thereof, and each said soaker plate having a plurality of ports disposed in a row transverse to the direction in which the printing plates move through said developing chamber whereby developing solution is sprayed on to each surface of the printing plates as they pass through said developing chamber; reservoir means for containing a supply of developing solution; means for delivering the developing solution from said reservoir means to the ports of said soaker plates; and feeding means for delivering a plate to said developing station.
Claim 2
Independent Claim
151 words
An apparatus for developing offset printing plates, said apparatus comprising: a developing station including two parallel soaker plates, made of textured stainless steel, defining a developing chamber between them, said soaker plates each having an upstream end and a downstream end and being inclined at a predetermined angle to the horizontal, said upstream end of each said soaker plate being higher than said downstream end thereof, and each said soaker plate having a plurality of ports disposed in a row transverse to the direction in which the printing plates move through said developing chamber whereby developing solution is sprayed on to each surface of the printing plates as they pass through said developing chamber; reservoir means for containing a supply of developing solution; means for delivering the developing solution from said reservoir means to the ports of said soaker plates; and feeding means for delivering a plate to said developing station.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein each said row includes four equally spaced apart ports.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1, wherein said predetermined angle lies in the range 5°-10°.
Claim 5
Dependent Claim
12 words
The apparatus of claim 3, wherein said predetermined angle is approximately 7°.
References Cited (Backward Citations)
US3641911A
Cited
US3774521A
Cited
US3732808A
Cited
US3791345A
Cited
US3916426A
Cited
US4222656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |