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    • 1. 发明专利
    • Improvements in machines for producing patterns photographically on the surface of copper and like rollers
    • GB665940A
    • 1952-02-06
    • GB1882349
    • 1949-07-18
    • LASZLO FRANK
    • G03F7/24
    • 665,940. Photo-mechanical printing surfaces. FRANK, L. July 20, 1950 [July 18, 1949], No. 18823/49. Class 98 (ii). A machine for photographic reproduction of patterns or designs on rollers as of copper comprises jacks supporting the ends of a mandrel carrying the roller at an adjustable height, a transparent cover to pass over the roller and hold a transparency of the pattern or design thereon, clamps beneath the roller for holding the ends of the transparent cover, and means for simultaneously raising the jacks to apply resilient pressure to the roller for tensioning the cover. The mandrel ends may be carried on rollers in the jacks to allow free turning and prevent uneven tensioning of the cover; and the jacks may be raised by rack and pinion mechanism acting through springs or by hydraulic means giving equality of tension. As shown, the mandrel ends b of roller c are carried by rollers d at the tops of jacks a; the transparent cover is clamped by a pair of bars in channel members, the front one of the pair being shown at m; hand wheels o on columns p are provided to give a preliminary tightening of the cover by raising jacks a and then the latter are further raised under uniform tension by operation of handle x to turn shaft w and hence a pinion v for each jack which raises racks u acting through springs (not shown) on the lower ends of the jacks. Ratchet mechanism y, z releasable by foot pedal 2 is provided to hold the jacks in the positions they have attained by manipulation of handle x. The Provisional Specification indicates, also, a method of raising the jacks simultaneously by use of two cams on a common shaft turned by a handle.
    • 2. 发明专利
    • Improvements relating to photomechanical printing processes
    • GB655016A
    • 1951-07-04
    • GB3070148
    • 1948-11-26
    • EUGENE ZIEGERLASZLO FRANK
    • G03F1/00
    • 655,016. Producing photo-mechanical printing-surfaces. ZIEGER, E., and FRANK, L. Nov. 26, 1948, No. 30701. [Class 98 (ii)] In the production of a photo-mechanical printing-surface, outlines are obtained round the objects constituting the original design and fine lines in such design are satisfactorily reproduced by printing the original design on to a lightsensitive surface, optionally with an interposed sheet of transparent material, e.g. celluloid, such printing being effected by exposures both to diffused light and a concentrated beam of light, developing and drying without fixing, effecting a further exposure, using a suitable screen or screens or shading medium if desired, and developing and fixing. The thickness of the interposed transparent sheet may be selected to give an outline of desired thickness, and the near side of the light-sensitive material may receive an antihalation coating after the first development to replace that removed during such development. Specification 428,668 is referred to.
    • 3. 发明专利
    • Improved device for dividing printing rollers or cylinders circumferentially into equal parts
    • GB668409A
    • 1952-03-19
    • GB1836549
    • 1949-07-12
    • LASZLO FRANKEUGENE ZIEGER
    • G03F9/00
    • 668,409. Photo-mechanical printing apparatus. FRANK, L., and ZIEGER, E. Aug. 31, 1950 [July 12, 1949], No. 18365/49. Classes 97 (iii) and 98 (ii). A device for dividing printing rollers circumferentially into equal parts comprises a composite ring structure, which may be placed around the roller, having three jaws guided in radial slots in one face thereof and movable simultaneously to equal extents to engage or release the roller by turning a ring incorporated in the composite ring structure, the other face of the ring structure having radial bars thereon, each having a side face serving to guide a member for marking the surface of the roller, the radial bars being spaced so that the surface can be divided by markings into any desired number of equal parts. As shown, a ring e is rotatable in a recess between rings band c, which are fastened together. Three evenly spaced clamping jaws h slide in grooves in ring b, and engage spiral grooves in ring e so that, when ring e is rotated by means of handles f the rings band c being held by a handle i) jaws h move together to clamp the device to roller a, or to release it. Ring c carries radial bars such as k, arranged in groups for dividing the roller surface into 2, 3, 4 or 5 equal parts. A straight edge o is laid against each bar of the chosen group in turn, so as to abut against the roller a to mark its surface. When one end of the roller has been marked, a line is drawn through one mark parallel to the roller axis, and the device is moved to the other end to make a second set of marks, the first of which coincides with the line.