US3719133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic plate developing apparatus
Assignee: Individual
•
Filing: 1972-02-18
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Granted: 1973-03-06
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Expires: 1992-02-18
Abstract
Abstract Developing of lithographic plates is accomplished on apparatus providing for applying the various chemicals used in the developing process by moveable applicators and spreading contact members. The applicators and spreading contact members move cyclically back and forth over the surface of the lithographic plate and are selectively operable to apply and spread any given chemical or water to the surface during any given cycle of the applicator and contact member assembly.
Inventors
- 👤 E Haracz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:19
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/3042
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
70 words
A lithographic plate developing apparatus comprising: a. a horizontal base, b. a front plate member mounted on said base, c. holding means for temporarily but securely mounting a lithographic plate to be developed on said front plate member, d. developing means spaced from and extending transversely across said front plate member and adapted for longitudinal cyclic movement back and forth over the front plate member in a plane parallel thereto,
Claim 2
Dependent Claim
70 words
A lithographic plate developing apparatus comprising: a. a horizontal base, b. a front plate member mounted on said base, c. holding means for temporarily but securely mounting a lithographic plate to be developed on said front plate member, d. developing means spaced from and extending transversely across said front plate member and adapted for longitudinal cyclic movement back and forth over the front plate member in a plane parallel thereto,
Claim 3
Dependent Claim
36 words
said developing means including a plurality of applicators for sequentially applying to said lithographic plate being developed the various chemicals and liquids used in the developing process during subsequent cyclic motions of said developing means, and
Claim 4
Dependent Claim
36 words
said developing means including a plurality of applicators for sequentially applying to said lithographic plate being developed the various chemicals and liquids used in the developing process during subsequent cyclic motions of said developing means, and
Claim 5
Dependent Claim
82 words
a plurality of contact means for evenly spreading said chemicals and liquids over the surface of the lithograph plate being developed, a. said plurality of contact means being selectively indexable so as to provide predetermined contact with said lithographic plate by only one of said contact means during any given cycle of said developing means, e. driving means for imparting said cyclic movement to said developing means, and f. oscillating means for imparting transverse back and forth motion to said contact means.
Claim 6
Dependent Claim
82 words
a plurality of contact means for evenly spreading said chemicals and liquids over the surface of the lithograph plate being developed, a. said plurality of contact means being selectively indexable so as to provide predetermined contact with said lithographic plate by only one of said contact means during any given cycle of said developing means, e. driving means for imparting said cyclic movement to said developing means, and f. oscillating means for imparting transverse back and forth motion to said contact means.
Claim 7
Dependent Claim
30 words
A lithographic plate developing apparatus according to claim 1 wherein said front plate member is mounted on said base at an angle with respect thereto ranging up to about 90*.
Claim 8
Dependent Claim
25 words
A lithographic plate developing apparatus according to claim 1 wherein said front plate member is mounted on said base in a horizontal plane parallel thereto.
Claim 9
Dependent Claim
49 words
A lithographic plate developing apparatus according to claim 1 wherein said lithographic plate holding means comprises a vacuum chamber positioned under a plurality of openings provided in said front plate member in an area appRoximating the area to be occupied by the lithographic plate temporarily but securely mounted thereon.
Claim 10
Dependent Claim
64 words
A lithographic plate developing apparatus according to claim 1 wherein said plurality of applicators included within said developing means is comprised of a series of transversely extending tubular members provided with a plurality of longitudinally spaced nozzle openings directed toward the lithographic plate to be developed, each tubular member adapted to supply one of the given chemicals or liquids used in the developing process.
Claim 11
Dependent Claim
80 words
A lithographic plate developing apparatus according to claim 1 wherein said plurality of contact means included within said developing means is a cylindrical member comprised of a series of transversely extending, circumferentially spaced contact segments provided with a relatively soft material on the surface adapted to contact said lithographic plate being developed, and each contact segment is selectively placeable into contact with said lithographic plate by indexing means adapted to rotate said cylindrical member through a predetermined angle of rotation.
Claim 12
Dependent Claim
60 words
A lithographic plate developing apparatus according to claim 1 wherein said driving means is comprised of a pair of spaced, parallel ball screws journaled for rotation adjacent each end and overlying said front plate member in a plane parallel thereto, said spaced, parallel ball screws threadably supporting said developing means, and means for imparting reversing rotation to said ball screws.
Claim 13
Dependent Claim
19 words
A lithographic plate developing apparatus according to claim 1 wherein said oscillating means is a driven cam wheel-linkage means.
References Cited (Backward Citations)
US820666A
Cited
US3528358A
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US3608464A
Cited
US3682078A
Cited
US3593641A
Cited
US3621772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |