US3597532A - Method and apparatus for the production of screen-printing forms with a pattern having a motif repeated at least in the direction of the line - Google Patents
Method and apparatus for the production of screen-printing forms with a pattern having a motif repeated at least in the direction of the line Download PDFInfo
- Publication number
- US3597532A US3597532A US775783A US3597532DA US3597532A US 3597532 A US3597532 A US 3597532A US 775783 A US775783 A US 775783A US 3597532D A US3597532D A US 3597532DA US 3597532 A US3597532 A US 3597532A
- Authority
- US
- United States
- Prior art keywords
- pattern area
- engraving
- storage means
- writing
- output information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007650 screen-printing Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 title description 10
- 238000003860 storage Methods 0.000 claims abstract description 23
- 230000003252 repetitive effect Effects 0.000 claims description 2
- 238000007639 printing Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/387—Composing, repositioning or otherwise geometrically modifying originals
Definitions
- ABSTRACT Scanning means scans a pattern area and the analog output signal thereof is converted to digital form. This digital signal is employed for causing an engraving means to produce a first pattern area on a screen printing form and is also employed through the intermediary of a writing means to provide output information on a magnetic storage means.
- H04n 1/06 means is interconnected with the writing means to reproduce H04n 1/28, H04n 5/76 the output information on the storage means so that the pat- [50] Field of Search 178/6.6, 6.6 tern area can be reproduced a plurality of times on the screen- B, 67, 6.6 A; 390/1 74.1 F; 179/1002 RE printing form.
- the invention relates to a method for the line-by-line preparation of screen printing forms with a pattern having a motif repeated at least in the direction of the lines, by means of an electromagnetically controlled engraving member, photoelectric means for the line-by-line scanning of the pattern, and an electric circuit for converting the analog signals received by the scanning means into discrete signals which are fed to a control circuit consisting of separate circuits for the electromagnetic control, at different strengths, of the engraving member, and apparatus for performing the method.
- Photographic means are used in the prior art method for producing a screen printing form with a pattern having a repeated motif.
- the pattern is copied and the resulting photographic plates are disposed on a plate or a roller of an engraving apparatus and scanned by photoelectric means, the electric signals obtained being used to control an engraving member which cuts the printing form.
- a disadvantage of the prior art method is that photographic copying is time wasting and expensive; moreover, reproducibility is unsatisfactory, since each motif on the printing form is produced to a different pattern.
- Another disadvantage is the variations in the scanning, which is also photoelectric.
- a store which is disposed in the connection between the scanning means and the control circuit for the engraving member and has a member for writing information into the store and a member for reading information out of the store, and the corresponding lines of the repeated motifs are written successively in a row extending in the direction of the line into the store and are again read out of the store
- the control circuit of the engraving member is operated without the intervention of the store for the engraving of the particular line of the first motif to be produced on the printing form, and is operated with the intervention of the store for the engraving of the corresponding line of each subsequent motif, while the information fed to the writing-in member for the first line ofthe row is supplied by the circuit between the scanning means and the engraving member and the information fed to the writing in member for each subsequent line of the row is supplied by the reading-out member.
- a line of the pattern is scanned once, these signals are used for controlling the engraving member, the signals also being received in the store, and the engraving member for engraving the particular line of the following motifs is controlled by the information from the store.
- the invention also relates to an engraving apparatus having an electromagnetically controlled engraving member, photoelectric means, an electric circuit for converting the analog signals received by the scanning means into discrete signals, and a control circuit which can be connected to the conversion circuit and consists of separate circuits for the electromagnetic control, at different strengths, of the engraving member.
- An engraving apparatus of this kind is more particularly suitable for the performance of the method as set forth in claim 2 if the apparatus has a store which is disposed between the scanning means and the control circuit for the engraving member and has a member for writing information into the store and a member for reading information out of the store, the apparatus also having changeover members by means of which the control circuit of the engraving member can be connected either to the scanning means or to the read ing-out member of the store, and the writing-in member of the store can be connected either to the: scanning means or to the reading-out member.
- the information concerning the pattern is preferably written into the store in the form of digital information. This can be done if the store is disposed? between the changeover circuit and the control circuit for the engraving member.
- the invention also relates to screen printing forms produced according to one of the methods described.
- FIG. I is a block circuit of an engraving member according to the invention.
- FIG. 2 shows diagrammatically a disc store.
- a pattern disposed on a roller I is scanned by photoelectric means 2, the resulting signals being fed to an analog-digital converter 3.
- the discrete signals produced by the converter 3 are converted in a coding member 4 to a code word which can be fed, in dependence on the condition of changeover means 5, either to a control circuit 6 for an engraving member 7, or to a disc store 3, or to both.
- the information read out of the store can also be fed to the control circuit 6.
- FIG. 2 shows diagrammatically a store disc 8.
- the angle A enclosed by the radius connecting a reading-out head 10 to a pivot 11, and the radius connecting a writing-in head 12 to the pivot 11 can be manually adjusted and must correspond to the distance occupied by the pattern along the periphery of the scanning roller 1.
- the reading-out head 10 and the writing head 12 can be electrically connected to one another by means of a switch 15.
- switches 9 and 15 are open.
- switches 13 and 14 must be opened, while switches 9 and 15 are closed.
- Apparatus for preparing screen printing forms having successively repetitive pattern areas comprising in combination,
- scanning means for scanning a pattern area and having an output related to the localized intensity of the pattern area as it is scanned
- engraving means for producing a first pattern area of varying local intensity on a screen printing form in response to the output of said scanning means
- writing means for writing into said storage means the output information supplied by said scanning means to said engraving means during said production of the first pattern area
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Abstract
Scanning means scans a pattern area and the analog output signal thereof is converted to digital form. This digital signal is employed for causing an engraving means to produce a first pattern area on a screen printing form and is also employed through the intermediary of a writing means to provide output information on a magnetic storage means. Readout means associated with a storage means utilizes this output information to cause the engraving means to repeat the first pattern area on the screen printing form and the readout means is interconnected with the writing means to reproduce the output information on the storage means so that the pattern area can be reproduced a plurality of times on the screen-printing form.
Description
United States Patent 1 1 1 3,597,532
[72] lnventors Ferdinand A. De Vos 56] References m Amsmi UNITED STATES PATENTS Jan H. Ter Steege, Abcoude, both of.
Nahum 2,832,064 4/1958 Lubkin 340/1 74.1 X (2 App, 775,783 3,107,347 10/1963 Huss 179/1002 X Nov 1 CI al I [45] Patented, 3,1971 3,272,918 9/1966 K011 et a1. 17816.6 [73] Assignee Werltspoor-Amsterdaln N-V- Primary Examiner-Terrell W. Fears Amsterdam, Netherhnds Assistant Examiner-Steven B. Pokotllow [32] Pr ori y w- L 1967 Attorney-[mine &'Smi1ey [33] Netherlands [31 67.16367 w w. a,
ABSTRACT: Scanning means scans a pattern area and the analog output signal thereof is converted to digital form. This digital signal is employed for causing an engraving means to produce a first pattern area on a screen printing form and is also employed through the intermediary of a writing means to provide output information on a magnetic storage means.
[54] METHOD AND APPARATUS FOR THE PRODUCTION OF SCREEN-PRINTING FORMS WITH A PATTERN HAVING A MOTIF REPEATED AT LEAST IN THE DIRECTION OF THE LINE 3cm": Dn'ingm Readout means associated with a storage means utilizes this [52] [1.8. CI 178/6.6 B, output information to cause the engraving means to repeat the 178/6.6 A, 179/ 100.2 RE, 340/ 174.1 P first pattern area on the screen printing form and the readout [51] Int. Cl. H04n 1/06, means is interconnected with the writing means to reproduce H04n 1/28, H04n 5/76 the output information on the storage means so that the pat- [50] Field of Search 178/6.6, 6.6 tern area can be reproduced a plurality of times on the screen- B, 67, 6.6 A; 390/1 74.1 F; 179/1002 RE printing form.
METHOD AND APPARATUS FOR THE PRODUCTION OF SCREEN-PRINTING FORMS WITH A PATTERN HAVING A MOTlllF IREIPEATED AT LEAST IN THE DIRECTION OF THE LINE The invention relates to a method for the line-by-line preparation of screen printing forms with a pattern having a motif repeated at least in the direction of the lines, by means of an electromagnetically controlled engraving member, photoelectric means for the line-by-line scanning of the pattern, and an electric circuit for converting the analog signals received by the scanning means into discrete signals which are fed to a control circuit consisting of separate circuits for the electromagnetic control, at different strengths, of the engraving member, and apparatus for performing the method.
Photographic means are used in the prior art method for producing a screen printing form with a pattern having a repeated motif. In this method the pattern is copied and the resulting photographic plates are disposed on a plate or a roller of an engraving apparatus and scanned by photoelectric means, the electric signals obtained being used to control an engraving member which cuts the printing form.
A disadvantage of the prior art method is that photographic copying is time wasting and expensive; moreover, reproducibility is unsatisfactory, since each motif on the printing form is produced to a different pattern. Apart from the faults caused by photographic copying, another disadvantage is the variations in the scanning, which is also photoelectric.
It is an object of the invention to provide a method which obviates these disadvantages by enabling the motifs of the printing form to be produced merely by the pattern being scanned once by the photoelectric scanning means.
To this end, according to the invention, use is made of a store which is disposed in the connection between the scanning means and the control circuit for the engraving member and has a member for writing information into the store and a member for reading information out of the store, and the corresponding lines of the repeated motifs are written successively in a row extending in the direction of the line into the store and are again read out of the store, and the control circuit of the engraving member is operated without the intervention of the store for the engraving of the particular line of the first motif to be produced on the printing form, and is operated with the intervention of the store for the engraving of the corresponding line of each subsequent motif, while the information fed to the writing-in member for the first line ofthe row is supplied by the circuit between the scanning means and the engraving member and the information fed to the writing in member for each subsequent line of the row is supplied by the reading-out member.
To this end, a line of the pattern is scanned once, these signals are used for controlling the engraving member, the signals also being received in the store, and the engraving member for engraving the particular line of the following motifs is controlled by the information from the store.
A very satisfactory result is obtained if the analog information received by the scanning means concerning the first line of the particular row is fed, after conversion into discrete signals, to the writing-in member of the store. By converting the information into discrete, for instance digital form, disturbances are avoided in reading out of the store and writing into the store.
The invention also relates to an engraving apparatus having an electromagnetically controlled engraving member, photoelectric means, an electric circuit for converting the analog signals received by the scanning means into discrete signals, and a control circuit which can be connected to the conversion circuit and consists of separate circuits for the electromagnetic control, at different strengths, of the engraving member. An engraving apparatus of this kind is more particularly suitable for the performance of the method as set forth in claim 2 if the apparatus has a store which is disposed between the scanning means and the control circuit for the engraving member and has a member for writing information into the store and a member for reading information out of the store, the apparatus also having changeover members by means of which the control circuit of the engraving member can be connected either to the scanning means or to the read ing-out member of the store, and the writing-in member of the store can be connected either to the: scanning means or to the reading-out member. To obtain a satisfactory signal to noise ratio, the information concerning the pattern is preferably written into the store in the form of digital information. This can be done if the store is disposed? between the changeover circuit and the control circuit for the engraving member.
The invention also relates to screen printing forms produced according to one of the methods described.
. An embodiment of the invention will now be described with reference to the accompanying drawings, wherein:
FIG. I is a block circuit of an engraving member according to the invention, and
FIG. 2 shows diagrammatically a disc store.
A pattern disposed on a roller I is scanned by photoelectric means 2, the resulting signals being fed to an analog-digital converter 3. The discrete signals produced by the converter 3 are converted in a coding member 4 to a code word which can be fed, in dependence on the condition of changeover means 5, either to a control circuit 6 for an engraving member 7, or to a disc store 3, or to both. The information read out of the store can also be fed to the control circuit 6.
FIG. 2 shows diagrammatically a store disc 8. The angle A enclosed by the radius connecting a reading-out head 10 to a pivot 11, and the radius connecting a writing-in head 12 to the pivot 11 can be manually adjusted and must correspond to the distance occupied by the pattern along the periphery of the scanning roller 1.
The reading-out head 10 and the writing head 12 can be electrically connected to one another by means of a switch 15. During the engraving ofa line of the first motif to be produced on the printing form switch 13 and switch 14 are closed, while switches 9 and 15 are open. For the engraving of the particular lines of the subsequent motifs, switches 13 and 14 must be opened, while switches 9 and 15 are closed.
In this way a pattern scanned by the reading-out head 10 of the disc 8 is fed to both the writing-in head 12 and the control circuit 6. Consequently, each pattern read out by the readingout head 10 is written in by the writing head 12 on the disc 8, so that when the disc has rotated through an angle A in the direction shown by the arrow, the reading-0ut head 12 can again read the same information from the disc.
We claim:
1. Apparatus for preparing screen printing forms having successively repetitive pattern areas, comprising in combination,
scanning means for scanning a pattern area and having an output related to the localized intensity of the pattern area as it is scanned,
engraving means for producing a first pattern area of varying local intensity on a screen printing form in response to the output of said scanning means,
magnetic storage means,
writing means for writing into said storage means the output information supplied by said scanning means to said engraving means during said production of the first pattern area,
readout means associated with said storage means arranged to encounter the output information in .said storage means when the output information concerning said first pattern area is completely written into said storage means,
and switch means for disconnecting said scanning means from said engraving means and said writing means, and for connecting said readout means to said engraving means and said writing means whereby a second pattern area is produced by said engraving means from said output information written into said storage means and said the output information written into said storage means is in digital form.
3. Apparatus according to claim 2 wherein said storage means comprises a roller, said writing means and said readout means being spaced circumferentially with respect to said roller.
Claims (3)
1. Apparatus for preparing screen printing forms having successively repetitive pattern areas, comprising in combination, scanning means for scanning a pattern area and having an output related to the localized intensity of the pattern area as it is scanned, engraving means for producing a first pattern area of varying local intensity on a screen printing form in response to the output of said scanning means, magnetic storage means, writing means for writing into said storage means the output information supplied by said scanning means to said engraving means during said production of the first pattern area, readout means associated with said storage means arranged to encounter the output information in said storage means when the output information concerning said first pattern area is completely written into said storage means, and switch means for disconnecting said scanning means from said engraving means and said writing means, and for connecting said readout means to said engraving means and said writing means whereby a second pattern area is produced by said engraving means from said output information written into said storage means and said output information is reproduced in said storage means during said production of the second pattern area.
2. Apparatus according to claim 1 wherein scanning means is a photosensitive device having an analog output signal varying in amplitude according to the localized intensity of the pattern area being scanned and an analog-to-digital converter for converting said analog output signal to digital form whereby the output information written into said storage means is in digital form.
3. Apparatus according to claim 2 wherein said storage means comprises a roller, said writing means and said readout means being spaced circumferentially with respect to said roller.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6716367A NL6716367A (en) | 1967-12-01 | 1967-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3597532A true US3597532A (en) | 1971-08-03 |
Family
ID=19801874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US775783A Expired - Lifetime US3597532A (en) | 1967-12-01 | 1968-11-14 | Method and apparatus for the production of screen-printing forms with a pattern having a motif repeated at least in the direction of the line |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3597532A (en) |
| CH (1) | CH495215A (en) |
| DE (1) | DE1811194C3 (en) |
| GB (1) | GB1235903A (en) |
| NL (2) | NL6716367A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2832064A (en) * | 1955-09-06 | 1958-04-22 | Underwood Corp | Cyclic memory system |
| US3107347A (en) * | 1961-07-10 | 1963-10-15 | Sperry Rand Corp | Magnetic field compensation means |
| US3122726A (en) * | 1958-01-02 | 1964-02-25 | Sperry Rand Corp | Recirculating binary data rate converter |
| US3272918A (en) * | 1963-12-27 | 1966-09-13 | Rudolf Hell Kommanditgesellsch | Method of and apparatus for recording picture signals, obtained by scanning picture originals to be reproduced, with steadily variable reproduction scale |
-
0
- NL NL137527D patent/NL137527C/xx active
-
1967
- 1967-12-01 NL NL6716367A patent/NL6716367A/xx unknown
-
1968
- 1968-11-14 US US775783A patent/US3597532A/en not_active Expired - Lifetime
- 1968-11-22 GB GB55613/68A patent/GB1235903A/en not_active Expired
- 1968-11-27 DE DE1811194A patent/DE1811194C3/en not_active Expired
- 1968-11-28 CH CH1772468A patent/CH495215A/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2832064A (en) * | 1955-09-06 | 1958-04-22 | Underwood Corp | Cyclic memory system |
| US3122726A (en) * | 1958-01-02 | 1964-02-25 | Sperry Rand Corp | Recirculating binary data rate converter |
| US3107347A (en) * | 1961-07-10 | 1963-10-15 | Sperry Rand Corp | Magnetic field compensation means |
| US3272918A (en) * | 1963-12-27 | 1966-09-13 | Rudolf Hell Kommanditgesellsch | Method of and apparatus for recording picture signals, obtained by scanning picture originals to be reproduced, with steadily variable reproduction scale |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1811194A1 (en) | 1969-07-17 |
| NL6716367A (en) | 1969-06-03 |
| NL137527C (en) | |
| DE1811194C3 (en) | 1974-07-11 |
| CH495215A (en) | 1970-08-31 |
| DE1811194B2 (en) | 1973-12-13 |
| GB1235903A (en) | 1971-06-16 |
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