GB280281A - Improvements in or relating to press-frames for duplicating or printing apparatus - Google Patents

Improvements in or relating to press-frames for duplicating or printing apparatus

Info

Publication number
GB280281A
GB280281A GB1979426A GB1979426A GB280281A GB 280281 A GB280281 A GB 280281A GB 1979426 A GB1979426 A GB 1979426A GB 1979426 A GB1979426 A GB 1979426A GB 280281 A GB280281 A GB 280281A
Authority
GB
United Kingdom
Prior art keywords
support
base
negative
holder
groove
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
Application number
GB1979426A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pictorial Machinery Ltd
Original Assignee
Pictorial Machinery Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pictorial Machinery Ltd filed Critical Pictorial Machinery Ltd
Priority to GB1979426A priority Critical patent/GB280281A/en
Publication of GB280281A publication Critical patent/GB280281A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/04—Copying apparatus without a relative movement between the original and the light source during exposure, e.g. printing frame or printing box
    • G03B27/06—Copying apparatus without a relative movement between the original and the light source during exposure, e.g. printing frame or printing box for automatic repeated copying of the same original

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Holders For Sensitive Materials And Originals (AREA)

Abstract

280,281. Harris. R., and Pictorial machinery, Ltd. Aug. 11, 1926. Printing-surfaces.-A press frame for duplicating or printing apparatus, particularly photographic step-and-repeat contact apparatus, comprises a negative or unit holder adjustably carried on a supporting member which is itself so mounted on a base member as always to occupy the same position thereon and to be readily slid on and off so that when replaced whilst carrying the negative it takes up automatically its desired setting. The frame as shown in Figs. 1 and 2 is constituted by a negative holder 10, a support 11, and base 12, the base being usually uppermost and adapted to transmit pressure to a negative 13 carried on a sheet of glass 114. The holder 10' is provided with four symmetrically disposed T- section slots 14 parallel with its ends in which work the heads of corresponding bolts 16 each having a clamp 17, 18 for engaging the holder and an inwardly directed lip 15 on the support 11. The negative can be adjusted in any position by sliding the bolts in the slots and when set according to registering marks can be secured by the nuts 19. To position the support accurately on the base 12 each end of the support is provided with a tongue 20, Fig. 3, that co-operates with a corresponding groove 21 in the base 12, and centre line grooves 22, 23, Fig. 1, on these members engage tongues 24, 25. The grooves 22, 23 may be formed in one and the same member; as shown however the groove 22 is on the support 11, Fig. 4, and the groove 23 on the base 12. The support is held in set position on the base 12 by a clamping device 30, and stops 26, 27 are providedto limit the forward sliding movement of the support.
GB1979426A 1926-08-11 1926-08-11 Improvements in or relating to press-frames for duplicating or printing apparatus Expired GB280281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1979426A GB280281A (en) 1926-08-11 1926-08-11 Improvements in or relating to press-frames for duplicating or printing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1979426A GB280281A (en) 1926-08-11 1926-08-11 Improvements in or relating to press-frames for duplicating or printing apparatus

Publications (1)

Publication Number Publication Date
GB280281A true GB280281A (en) 1927-11-11

Family

ID=10135321

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1979426A Expired GB280281A (en) 1926-08-11 1926-08-11 Improvements in or relating to press-frames for duplicating or printing apparatus

Country Status (1)

Country Link
GB (1) GB280281A (en)

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