US3860749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for the production of printing stencils
Assignee: Individual
•
Filing: 1973-03-19
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Granted: 1975-01-14
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Expires: 1993-03-19
Abstract
Abstract A method of and an apparatus for the production of printing matrices with the aid of at least one light-sensitive layer applied to a matrix or a matrix support. The exposure of the uppermost, light-sensitive layer is effected by the consecutive projection of pattern-dictated raster dots or groups of raster dots in the peripheral direction of the matrix or the matrix support, and the apparatus comprises the matrix or matrix support, and a raster-dot pattern-carrying roller as well as a device for exposing the uppermost light-sensitive layer by the consecutive projection of the raster dots or groups of the raster dots in the peripheral direction of the matrix or matrix support.
Inventors
- 👤 Josef Kolerus
- 👤 Hans Peterschinegg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:35
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/12; H; H04; H04N; H04N1/00; H04N1/40; H04N1/405; H04N1/4055
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
140 words
A method of the production of printing matrices with the aid of at least one light-sensitive layer applied to a matrix or a matrix support, wherein the exposure of the uppermost, lightsensitive layer is effected by the consecutive projection of at least one group of pattern-dictated raster dots in the peripheral direction of the matrix or the matrix support, producing a length of said pattern, said lengths being determined in relation to a cylinder-generating length, and subdivided into a given number of equal fractional areas that is dependent on the raster-number selected and on the total of photo-cells present in the optical recording head, as well as on the focal length of the latter, the fractional areas being arranged to be sensed in succession in the peripheral direction with the optical recording head immobile and rotating a pattern carrying roller.
Claim 2
Independent Claim
140 words
A method of the production of printing matrices with the aid of at least one light-sensitive layer applied to a matrix or a matrix support, wherein the exposure of the uppermost, lightsensitive layer is effected by the consecutive projection of at least one group of pattern-dictated raster dots in the peripheral direction of the matrix or the matrix support, producing a length of said pattern, said lengths being determined in relation to a cylinder-generating length, and subdivided into a given number of equal fractional areas that is dependent on the raster-number selected and on the total of photo-cells present in the optical recording head, as well as on the focal length of the latter, the fractional areas being arranged to be sensed in succession in the peripheral direction with the optical recording head immobile and rotating a pattern carrying roller.
Claim 3
Independent Claim
65 words
An apparatus for the production of printing matrices, comprising a matrix or matrix support adapted to receive at least one light-sensitive layer, a raster dot pattern-carrying roller adapted to receive a single pattern and means for exposing the uppermost light-sensitive layer by the consecutive projection of the raster dots or groups of the raster dots in the peripheral direction of the matrix or matrix support.
Claim 4
Independent Claim
65 words
An apparatus for the production of printing matrices, comprising a matrix or matrix support adapted to receive at least one light-sensitive layer, a raster dot pattern-carrying roller adapted to receive a single pattern and means for exposing the uppermost light-sensitive layer by the consecutive projection of the raster dots or groups of the raster dots in the peripheral direction of the matrix or matrix support.
Claim 5
Dependent Claim
31 words
The apparatus, as set forth in claim 2, wherein there is provided, between the pattern-carrying roller and the matrix or matrix support, a gear train having a whole number gear ratio.
Claim 6
Dependent Claim
57 words
The apparatus, as set forth in claim 2, wherein the pattern-carrying roller is adapted to be scanned optically in the peripheral direction by at least one photo-cell, the light and dark sequence recorded by each photo-cell being arranged to be superimposed on individual pulses initiated by a pulse generator and light-processed onto the matrix or matrix support.
Claim 7
Dependent Claim
47 words
The apparatus, as set forth in claim 4, wherein the number of pulses omitted by the pulse generator is arranged to be proportional to the angle of rotation of the matrix or matrix support and is discretely divisible into the circumference of the matrix or matrix support.
Claim 8
Dependent Claim
29 words
The apparatus, as set forth in claim 5, wherein the pulses in the pulse generator are arranged to be initiated by optical grade marked-cut discs by means of photo-cells.
Claim 9
Dependent Claim
24 words
The apparatus, as set forth in claim 5, wherein the pulses in the pulse generator are arranged to be initiated by an induction technique.
Claim 10
Dependent Claim
20 words
The apparatus, as set forth in claim 4, wherein an optical recording head with a fixed focal length is provided.
Claim 11
Dependent Claim
23 words
The apparatus, as set forth in claim 4, wherein an optical recording head with an adjustable focal length (an elastic lens) is provided.
Claim 12
Dependent Claim
20 words
The apparatus, as set forth in claim 4, wherein, an optical recording head with a turret-type lens system is provided.
Claim 13
Dependent Claim
30 words
The apparatus, as set forth in claim 8, wherein a number of photo-cells is installed in the optical recording head, the arrangement of said photo-cells corresponding to the raster selected.
Claim 14
Dependent Claim
35 words
The apparatus, as set forth in claim 11, wherein the photo-cells are exchanged in groups, for instance in the form of insertable components, corresponding to the raster-type and raster-number of the raster to be light-processed.
Claim 15
Dependent Claim
48 words
The apparatus, as set forth in claim 2, wherein the optical recording head is positioned by being connected to an arrangement for step-by-step displacement which is coupled electrically or mechanically to a light-processing arrangement which responds upon the halting of the optical recording head between the individual steps.
Claim 16
Dependent Claim
42 words
The apparatus, as set forth in claim 13, wherein the recording head is mounted on a precision spindle driven by a servomotor, an arrangement in each instance actuating the servomotor until the recording head has been displaced by a specifically predetermined step.
Claim 17
Dependent Claim
69 words
The apparatus, as set forth in claim 2, which is arranged such that duRing the light-processing of the fractional area of pattern applied on the pattern-carrying roller, in every instance following a revolution of the matrix or matrix support, a flash unit is displaced simultaneously with and in the same direction as the optical recording head, the paths of displacement of these two units being proportional to each other.
Claim 18
Dependent Claim
48 words
The apparatus, as set forth in claim 15, arranged such that after the termination of the light-processing of a fractional area of pattern applied to the pattern-carrying unit the optical recording head returns to its initial position while the flash unit travels along its normal path of displacement.
Claim 19
Dependent Claim
30 words
The apparatus, as set forth in claim 15, wherein a precision spindle adapted to be driven by means of a servometer is provided for the positioning of the flash unit.
Claim 20
Dependent Claim
44 words
The apparatus, as set forth in claim 17, wherein the precision spindle is adapted to be driven by the servomotor for the displacement device for the optical recording head by way of a shiftable coupling and a gear train with an alterable gear ratio.
Claim 21
Dependent Claim
15 words
The apparatus, as set forth in claim 17, wherein the servomotor is a stepping motor.
Claim 22
Dependent Claim
54 words
The apparatus, as set forth in claim 19, wherein the servomotor is in each instance adapted to be set in operation for as long as a voltage drop is present between a precision potentiometer (whose resistance is dependent on the position of the optical recording head) and a given step of a voltage divider.
Claim 23
Dependent Claim
28 words
The apparatus, as set forth in claim 20, wherein the same voltage divider is employed for the positioning of the optical recording head and of the flash unit.
Claim 24
Dependent Claim
27 words
The apparatus, as set forth in claim 21, wherein at least one reflective loop galvanometer is installed in the path of the rays of the flash unit.
Claim 25
Dependent Claim
27 words
The apparatus, as set forth in claim 22, wherein the frequency of oscillation of the reflective loop galvanometer is in the range from 10,000 to 14,000 Hz.
Claim 26
Dependent Claim
21 words
The apparatus, as set forth in claim 4, wherein the pulse generator is mechanically coupled to the matrix or matrix support.
Claim 27
Dependent Claim
19 words
The apparatus, as set forth in claim 4, wherein said pulse generator is coupled mechanically rigidly with said matrix.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |