US3736869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure roller device for a rotogravure printing press
Assignee: MOTTER Corp A CORP OF DE
•
Filing: 1971-03-16
•
Granted: 1973-06-05
•
Expires: 1991-03-16
Abstract
Abstract Pressure roller device for equalizing the printing pressure in a rotogravure press. The press includes a printing cylinder, an impression roller and a back-up roller arranged in tangential relationship. It also includes common movable supports for the ends of the impression roller and back-up roller to maintain the impression roller and back-up roller in tangential relationship and to bring the impression roller into pressure engagement with the printing cylinder. At least one pressure roller device is provided, according to the present invention, for applying a force against the back-up roller intermediate the ends thereof in the direction of the impression roller and the printing cylinder. This force increases the uniformity of the pressure applied by the impression roller against the surface of the printing cylinder.
Inventors
- 👤 J Motter
- 👤 J Motter Jr
- 👤 L Lachman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:55
CPC Classifications
B; B41; B41F; B41F13/00; B41F13/08; B41F9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
190 words
A rotogravure press comprising a rotatable printing cylinder, means for supporting the printing cylinder at both ends, a rotatable impression roller, a rotatable back-up roller, common movable supports for the ends of the impression roller and backup roller to carry the impression roller and back-up roller in tangential relationship and means for applying a force against the ends of the back-up roller in a direction such that the impression roller is brought into pressure engagement with the printing cylinder, the build-up of pressure between the surfaces of the impression roller and the printing cylinder being greater at the ends thereof than at a point midway between the ends, wherein the improvement comprises at least one pressure roller means, arranged adjacent to and substantially midway between the ends of said back-up roller on the side thereof which is opposite said impression roller, for applying a force against said back-up roller substantially midway between the ends thereof, to bow said back-up roller intermediate the ends thereof in the direction of said impression roller to increase the uniformity of the pressure applied by said impression roller against said surface of said printing cylinder.
Claim 2
Dependent Claim
190 words
A rotogravure press comprising a rotatable printing cylinder, means for supporting the printing cylinder at both ends, a rotatable impression roller, a rotatable back-up roller, common movable supports for the ends of the impression roller and backup roller to carry the impression roller and back-up roller in tangential relationship and means for applying a force against the ends of the back-up roller in a direction such that the impression roller is brought into pressure engagement with the printing cylinder, the build-up of pressure between the surfaces of the impression roller and the printing cylinder being greater at the ends thereof than at a point midway between the ends, wherein the improvement comprises at least one pressure roller means, arranged adjacent to and substantially midway between the ends of said back-up roller on the side thereof which is opposite said impression roller, for applying a force against said back-up roller substantially midway between the ends thereof, to bow said back-up roller intermediate the ends thereof in the direction of said impression roller to increase the uniformity of the pressure applied by said impression roller against said surface of said printing cylinder.
Claim 3
Dependent Claim
27 words
The press defined in claim 1, having two pressure roller means arranged adjacent to said back-up roller on the side thereof which is opposite said impression roller.
Claim 4
Dependent Claim
43 words
The press defined in claim 2, wherein each of said two pressure roller means is arranged adjacent to said back-up roller between one end and the center thereof, said two pressure roller means being equidistant from but on opposite sides of said center.
Claim 5
Dependent Claim
26 words
The press defined in claim 1, wherein said pressure roller means includes at least one roller which is substantially shorter in length than said back-up roller.
Claim 6
Dependent Claim
48 words
The press defined in claim 1, wherein each of said pressure roller means includes: a. a yoke; b. two rollers rotatably mounted on said yoke with their axes in parallel; and c. means for applying a force against said yoke to press said rollers against said back-up roller.
Claim 7
Dependent Claim
14 words
The press defined in claim 4, wherein said force applying means is hydraulically actuated.
Claim 8
Dependent Claim
14 words
The press defined in claim 4, wherein said force applying means is pneumatically actuated.
Claim 9
Dependent Claim
33 words
The preSs defined in claim 5, wherein said force applying means includes a cylinder rigidly mounted on said press; a piston, arranged within said cylinder and means connecting said piston to said yoke.
Claim 10
Dependent Claim
40 words
The press defined in claim 8, wherein said connecting means is attached to said yoke by means of a pivot which extends parallel to said axes of said two rollers and transverse to the longitudinal axis of said connecting means.
Claim 11
Dependent Claim
16 words
The press defined in claim 8, wherein said connecting means is rotatable about its longitudinal axis.
References Cited (Backward Citations)
GB191328503A
Cited
US2395915A
Cited
US2718827A
Cited
US3119324A
Cited
US3272122A
Cited
US3266414A
Cited
US3204552A
Cited
US3405633A
Cited
US3557689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |