GB733037A - Apparatus for the production of printing plates - Google Patents
Apparatus for the production of printing platesInfo
- Publication number
- GB733037A GB733037A GB12888/53A GB1288853A GB733037A GB 733037 A GB733037 A GB 733037A GB 12888/53 A GB12888/53 A GB 12888/53A GB 1288853 A GB1288853 A GB 1288853A GB 733037 A GB733037 A GB 733037A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slide
- scanning
- picture
- line
- original
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 4
- 239000005357 flat glass Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 230000003287 optical effect Effects 0.000 abstract 2
- 230000003321 amplification Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 238000005286 illumination Methods 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/02—Engraving; Heads therefor
- B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M9/00—Processes wherein make-ready devices are used
-
- 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
- H04N1/393—Enlarging or reducing
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Facsimile Image Signal Circuits (AREA)
- Projection-Type Copiers In General (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
733,037. Copying-telegraphy. HELL, R. May 8, 1953 [May 9, 1952; Dec. 5, 1952; Dec. 27, 1952], No. 12888/53. Class 40 (3). A device for the production of printing plates of the type wherein the picture original is scanned line-by-line photoelectrically while an engraving tool controlled by the photo-electric current is guided line-by-line across the printing plate blank in correspondence with the scanning means, comprises a slide which is guided positively in relation to the scanning means and carries the picture original on one side and the printing plate blank on the other side. Several embodiments are described but each entails a large C-shaped member which embraces the slide and carries the scanning means at the end of one arm and the engraving means at the end of the other, the slide being reciprocated to produce a line scan while the C-shaped member carries out a feed movement perpendicularly to the line-scanning direction during each return movement of the slide. As the scanning is normally required to be at an angle to the edge of the picture the useful line scan varies in length as the perpendicular feed proceeds and various automatic means for limiting the stroke to the useful scan are disclosed. The machine shown in Fig. 1 comprises a slide 3 traversable on runners 1 and 2 by a motor 13 which drives a threaded shaft 20 through gears 22, 23 or 15, 16, 17 according to the position of reversing lever 38. The gear ratios are such that the slide 3 is driven faster in its return travel than when travelling forward in the direction of arrow 12. The slide 3 has an aperture 5 containing a glass plate onto which the picture original is placed facing downwards, and above which the printing plate blank is suitably supported. A C-shaped member 8, carrying engraving means 6 and photo-electric scanning means 7 arranged directly opposite each other, is guided on a rail 9 and spindle 41, rotation of the latter producing a feed movement in the direction of the arrow 11. Rigidly depending from the slide 3 is a frame 4 corresponding in position and shape to the aperture 5. Carried on the lower part of the C-shaped member 8 is a slidable strip 28 having stops 25, 26 rigidly depending therefrom and projecting into the frame 4 such that the edges of the frame 4 impinge on one or other of the stops respectively at the limits of the useful line-scanning travel of slide 3. The strip 28 is thus moved at these limits and a fork 27 fixed thereto tilts a bar 31 about fulcra 29, 30; this causes lever 32 to move the link 33 and by means of spring- loaded roller 35 imparts a snap-action changeover to reversing lever 38. The link 33 in its passage to the left momentarily releases a detent 43 from notched wheel 42 and allows spindle 41 to revolve (under drive from motor 13 via a slip clutch in gearbox 40) until detent 43 engages the next notch; this produces line feed of member 8 in the direction of arrow 11. In the reverse movement the linkage articulates at pivot 37 and does not affect detent 43. If the picture original is smaller than the aperture 5 the stops 25, 26 may be moved apart by adjusting screw 39. A lever 49 pivoted at 48 is connected to the strip 28 such that a shutter 50 is moved into the path of light in the scanning means 7 during the return movement of the slide 3. In the embodiment of Figs. 2 and 3 (not show-n) the slide 3 has a rotatable insert to carry the picture original and printing plate blank so that the direction of scan may be varied as necessary for the production of colour separation plates; the insert is coupled by a flexible shaft to a rotary colour filter holder such that the appropriate filter is brought into the path of the scanning light beam. To produce a half-tone dot pattern the light beam is interrupted by a rotating perforated disc synchronized with the drive to slide 3 by means of a sonic wheel. Reversal of the scanning drive to slide 3 is effected by an electromagnetic clutch mechanism energized via contacts operated respectively by feelers engaging the alternate edges of the insert in the slide 3. The line feed of member 8 is controlled by a pawl temporarily released by a relay energized by the appropriate reversal contacts. The top arm of the member 8 is pivoted and is maintained at the correct spacing from the printing plate blank by an adjustable supporting foot which rides on the blank in close proximity to the engraving stylus. This feature also allows a new stylus to be readily set to the correct " zero " position. Instead of mechanical or electro-mechanical control of the scanning drive reversals, the photo-electric system may be utilised to signal when the edge of the picture has been reached by backing the picture with a plate-glass mirror as indicated in Fig. 4 (not shown). The large output thus obtained when the edge of the diffusely reflecting picture is passed operates a relay (for example) that does not respond to the relatively weak picture signals. Alternatively the plate-glass may be omitted and the backing plate given a light-reflecting surface, but in this case the optical axis of the light beam must be inclined to allow specularly reflected light to impinge on the photo-cell or the reflecting surface must be corrugated. Instead of producing a half-tone dot pattern by means of intermittent illumination, the picture original may be covered by a screen which need only comprise a raster of parallel lines since the cross scanning will produce the requisite dotfrequency. The spacing of the scanning lines, the' lines on the screen and the angle therebetween will be interdependent for optimum results, as indicated in Fig. 6 (not shown). The modification of Fig. 5 (not shown) provides for the production of printing plates of a size differing from that of the picture original. The original is arranged on an illuminated table carried on an arm depending from the slide 3 which also carries an optical projection system to throw an image onto a screen in the position occupied by the original in the former embodiments. Scanning is carried out by elemental examination of the screen using a photo-cell and lens system on the C-shaped member 8 while slide 3 together with the projection assembly is reciprocated as before. Setting-up plates (for backing printing plates in the printing process so as to relieve pressure on the light portions) may be produced in a similar manner as above but with a larger scanning spot of light, a wider engraving tool or milling cutter and a greater rate of feed. Alternatively the printing plate itself may be engraved on its reverse side for setting-up purposes. The engraved printing plate itself may be used as the original to be scanned, either polished or inked with black or white ink (the control current being relatively reversed for the black or white inked plates). A half-tone dot pattern is not required for this relief engraving but a pulsating current is more readily amplified so the scanning light beam or the photo-cell output is modulated at a high arbitrary frequency and rectified after amplification. Such an arrangement using an electro-magnetically controlled rotary drill engraving tool is illustrated in Fig. 7 (not shown). This process may be greatly simplified by inverting the scanner and engraver and keeping them fixed while the plate is moved by hand, face upwards, over an aperture in a table. The operator can thus see the printing plate and select those light areas requiring back-engraving and omit remaining parts of the plates, thereby eliminating the mechanical drive and reducing the working time.
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH11888A DE946329C (en) | 1952-03-20 | 1952-03-20 | Process for the production of screened clichés using the methods of image telegraphy |
DEH12481A DE940624C (en) | 1952-03-20 | 1952-05-09 | Device for the production of screened printing forms by photoelectric transmission of images |
DEH12496A DE924306C (en) | 1952-03-20 | 1952-05-13 | Process for the production of printing forms with a selectable reproduction scale by photoelectric transmission in original images |
DEH12721A DE938351C (en) | 1952-03-20 | 1952-05-30 | Process for the production of screened printing forms by photoelectric transmission of original images |
DEH14667A DE927813C (en) | 1952-03-20 | 1952-12-05 | Process for preparing screened clichés |
DEH14878A DE941833C (en) | 1952-03-20 | 1952-12-27 | Device for the production of printing forms |
DEH15920A DE927666C (en) | 1952-03-20 | 1953-03-30 | Process for the electromechanical production of printing forms with a selectable reproduction scale |
Publications (1)
Publication Number | Publication Date |
---|---|
GB733037A true GB733037A (en) | 1955-07-06 |
Family
ID=27561655
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7609/53A Expired GB726846A (en) | 1952-03-20 | 1953-03-19 | Improvements in or relating to the photo-mechanical production of half-tone printingplates |
GB12888/53A Expired GB733037A (en) | 1952-03-20 | 1953-05-08 | Apparatus for the production of printing plates |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7609/53A Expired GB726846A (en) | 1952-03-20 | 1953-03-19 | Improvements in or relating to the photo-mechanical production of half-tone printingplates |
Country Status (5)
Country | Link |
---|---|
US (2) | US2925463A (en) |
CH (1) | CH322661A (en) |
DE (7) | DE946329C (en) |
FR (2) | FR1076207A (en) |
GB (2) | GB726846A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2909598A (en) * | 1955-07-05 | 1959-10-20 | Rudolf Hell Kommanditgesellsch | Producing printing plates with selectively variable reproduction scale |
GB2217146A (en) * | 1988-04-07 | 1989-10-18 | Parkfield Group Plc | Producing an enlargement of a visual representation |
CN113028221A (en) * | 2021-03-06 | 2021-06-25 | 哈尔滨工业大学 | Intellectual property data batch acquisition equipment |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL109796C (en) * | 1954-05-10 | |||
DE960608C (en) * | 1955-04-15 | 1957-03-21 | Hell Rudolf Dr Ing Fa | Device for the electromechanical production of printing forms with variable reproduction scale |
US3075042A (en) * | 1959-12-23 | 1963-01-22 | Fairchild Camera Instr Co | Cold cutting technique for half-tone electronic engraving |
US3075895A (en) * | 1960-02-15 | 1963-01-29 | Gen Dev Corp | Method of preparing plates for electromechanical engraving |
US3103168A (en) * | 1962-03-19 | 1963-09-10 | Braco Engraving Co | Printing plates |
FR1352215A (en) * | 1962-12-28 | 1964-02-14 | Process for manufacturing clichés, installation for implementing this process, and clichés obtained | |
US3404254A (en) * | 1965-02-26 | 1968-10-01 | Minnesota Mining & Mfg | Method and apparatus for engraving a generally cross-sectionally circular shaped body by a corpuscular beam |
DE1901101A1 (en) * | 1969-01-10 | 1970-10-29 | Hell Rudolf Dr Ing Fa | Method for point-by-point and line-by-line rasterized recording of the image signals obtained by scanning halftone images with raster rotated against the recording direction |
US4084183A (en) * | 1970-03-18 | 1978-04-11 | Dr. Ing. Rudolf Hell Gmbh. | Method for the electro-optical reproduction of half-tone pictures |
US3770888A (en) * | 1971-10-04 | 1973-11-06 | Werkspoor Amsterdam Nv | Method and apparatus for controlling the engraving pattern of an electromagnetic gravure engraving |
JPS51123511A (en) * | 1975-04-22 | 1976-10-28 | Oki Electric Ind Co Ltd | Degree recording method |
CN113635192B (en) * | 2021-08-17 | 2022-08-19 | 三明学院 | Glass toughening treatment equipment and process |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1849544A (en) * | 1930-01-31 | 1932-03-15 | Howey Walter | Process of and apparatus for producing printing plates |
US1918124A (en) * | 1930-08-25 | 1933-07-11 | Communications Patents Inc | Arc scanning facsimile system |
US2005130A (en) * | 1931-07-28 | 1935-06-18 | Dalton John Willey | Electrical circuit and apparatus |
US2063614A (en) * | 1931-12-14 | 1936-12-08 | Mackinner Corp | Method and apparatus for making printing plates |
US2092765A (en) * | 1932-12-19 | 1937-09-14 | William A Hughes | Electric machine |
US2079970A (en) * | 1933-01-16 | 1937-05-11 | William C Speed | Process and apparatus for photoelectric engraving |
US2076220A (en) * | 1934-02-03 | 1937-04-06 | Joseph A Bennett | Method of and means for producing printing plates |
US2149487A (en) * | 1934-05-15 | 1939-03-07 | Myron C Zilberman | Half-tone engraving and apparatus for and method of making the same |
US2294645A (en) * | 1940-07-05 | 1942-09-01 | Interchem Corp | Printing plate |
US2312042A (en) * | 1940-08-03 | 1943-02-23 | George E Losier | Electric circuit for photoelectric engraving machines |
US2355047A (en) * | 1942-02-24 | 1944-08-08 | Lynch Corp | Nonlinear modulating system |
US2544225A (en) * | 1946-04-13 | 1951-03-06 | David H Hearle | Pantograph engraving machine |
US2638500A (en) * | 1951-06-28 | 1953-05-12 | Clare E Ernst | Process and apparatus for photoelectric engraving |
-
1952
- 1952-03-20 DE DEH11888A patent/DE946329C/en not_active Expired
- 1952-05-09 DE DEH12481A patent/DE940624C/en not_active Expired
- 1952-05-13 DE DEH12496A patent/DE924306C/en not_active Expired
- 1952-05-30 DE DEH12721A patent/DE938351C/en not_active Expired
- 1952-12-05 DE DEH14667A patent/DE927813C/en not_active Expired
- 1952-12-27 DE DEH14878A patent/DE941833C/en not_active Expired
-
1953
- 1953-02-18 FR FR1076207D patent/FR1076207A/en not_active Expired
- 1953-03-11 US US341641A patent/US2925463A/en not_active Expired - Lifetime
- 1953-03-19 GB GB7609/53A patent/GB726846A/en not_active Expired
- 1953-03-30 DE DEH15920A patent/DE927666C/en not_active Expired
- 1953-04-14 CH CH322661D patent/CH322661A/en unknown
- 1953-05-05 US US353212A patent/US2863000A/en not_active Expired - Lifetime
- 1953-05-07 FR FR1090404D patent/FR1090404A/en not_active Expired
- 1953-05-08 GB GB12888/53A patent/GB733037A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2909598A (en) * | 1955-07-05 | 1959-10-20 | Rudolf Hell Kommanditgesellsch | Producing printing plates with selectively variable reproduction scale |
GB2217146A (en) * | 1988-04-07 | 1989-10-18 | Parkfield Group Plc | Producing an enlargement of a visual representation |
CN113028221A (en) * | 2021-03-06 | 2021-06-25 | 哈尔滨工业大学 | Intellectual property data batch acquisition equipment |
CN113028221B (en) * | 2021-03-06 | 2022-06-24 | 哈尔滨工业大学 | Intellectual property data batch acquisition equipment |
Also Published As
Publication number | Publication date |
---|---|
FR1076207A (en) | 1954-10-25 |
GB726846A (en) | 1955-03-23 |
US2925463A (en) | 1960-02-16 |
US2863000A (en) | 1958-12-02 |
CH322661A (en) | 1957-06-30 |
DE941833C (en) | 1956-04-19 |
DE924306C (en) | 1955-03-07 |
DE938351C (en) | 1956-03-01 |
FR1090404A (en) | 1955-03-30 |
DE927813C (en) | 1955-05-16 |
DE927666C (en) | 1955-05-12 |
DE946329C (en) | 1956-07-26 |
DE940624C (en) | 1956-03-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB733037A (en) | Apparatus for the production of printing plates | |
US2262584A (en) | Scanning apparatus | |
AU4722093A (en) | Automatic operations on materials | |
JPS5596917A (en) | Two-dimensional scanner | |
GB1522514A (en) | Method of information processing for the production of a printing form and a system for performing said method | |
US3461229A (en) | Electro-optical reproduction method | |
US2881246A (en) | Engraving machine | |
EP0363206A3 (en) | A method of and an apparatus for projecting a scanned two- or threedimensional modulated light pattern originating from a light source | |
US2925464A (en) | Machine for producing a facsimile reproduction | |
US2149487A (en) | Half-tone engraving and apparatus for and method of making the same | |
US2086798A (en) | Photoelectrical device for producing half-tone cuts | |
US3210466A (en) | Image display system using mechanically embossed optical record | |
US2986598A (en) | Machine for producing printing plates with variable reproduction scale | |
US3925602A (en) | Apparatus for engraving a portrait on certification card | |
DE687206C (en) | corner | |
US3120577A (en) | Scanning system | |
GB715619A (en) | Metal working machines and optical projection apparatus therefor | |
US2875275A (en) | Variable ratio photoelectric engraving machine | |
GB834017A (en) | Improvements in or relating to apparatus for the electro-mechanical production of screened printing plates | |
JPS5714820A (en) | Optical scanner | |
US4975784A (en) | Method for graving printing forms | |
US2877298A (en) | Apparatus for producing printing forms with variable reproduction scale | |
US3479452A (en) | Machine for producing engraving plates for stereoscopic reproductions | |
US2987573A (en) | Enlarging and reducing photoelectric engraving machine | |
US3872242A (en) | Facsimile flatbed transceiver |