US4155766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Half tone screen for rotary gravure printing
Assignee: Individual
•
Filing: 1976-12-21
•
Granted: 1979-05-22
•
Expires: 1996-12-21
Abstract
Abstract The opaque elements of a half-tone screen for gravure printing using a rotary printing machine are connected with each other by fine connections extending in the direction of cylinder movement.
Inventors
- 👤 Helmut Hieber
- 👤 Horst Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:15
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A halftone screen for use in rotary gravure printing comprising a screen having opaque and transparent areas, the opaque areas being in the shape of parallel rows of squares with opposite corners of the squares in one direction connected to adjacent squares in the row by fine opaque lines and with the squares of the parallel adjacent rows in said one direction being staggered with respect to the squares of the adjacent rows with each row of squares separated by a continuous transparent area in a zigzag configuration.
Claim 2
Dependent Claim
88 words
A halftone screen for use in rotary gravure printing comprising a screen having opaque and transparent areas, the opaque areas being in the shape of parallel rows of squares with opposite corners of the squares in one direction connected to adjacent squares in the row by fine opaque lines and with the squares of the parallel adjacent rows in said one direction being staggered with respect to the squares of the adjacent rows with each row of squares separated by a continuous transparent area in a zigzag configuration.
References Cited (Backward Citations)
US1307824A
Cited
CH125501A
Cited
US1990231A
Cited
GB503945A
Cited
GB501924A
Cited
GB631118A
Cited
US3928038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |