GB477805A - Improvements in driving gear for continuous working photographic copying and treatment machines - Google Patents

Improvements in driving gear for continuous working photographic copying and treatment machines

Info

Publication number
GB477805A
GB477805A GB8555/37A GB855537A GB477805A GB 477805 A GB477805 A GB 477805A GB 8555/37 A GB8555/37 A GB 8555/37A GB 855537 A GB855537 A GB 855537A GB 477805 A GB477805 A GB 477805A
Authority
GB
United Kingdom
Prior art keywords
roller
driving gear
strip
ratchet
rod
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
GB8555/37A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB477805A publication Critical patent/GB477805A/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)
  • Transmission Devices (AREA)

Abstract

477,805. Photographic copying and developing apparatus. JANZER, C. March 23, 1937, No. 8555. Convention date, April 1, 1936. [Class 98 (i)] An adjustable driving gear for giving a step-by-step movement to a sensitized strip through a copying apparatus and a continuous movement to a take-up mechanism comprises a single ratchet mechanism 7, 8, Fig. 1, operating a feed roller 3, Fig. 5, which draws the strip past an exposure apparatus 2, and a double ratchet mechanism for operating a take-up roller 20 for winding up the strip after it has passed a developing or treatment bath. The rod 10, Fig. 1, provided at one end with a single rack 9 and at the other with two racks 12, 13 in different planes is reciprocated by a connecting rod 23 attached to an adjustable throw crank 25. On each reciprocation of the rod 10 the roller 3 is rotated by a ratchet and pawl 7, 8. The racks 12, 13 engage pinions each of which carries a pawl engaging a ratchet wheel 19 to give a practically continuous rotation to the roller 20. The exposure is effected by a lever 35 operated by a cam 28.
GB8555/37A 1936-04-01 1937-03-23 Improvements in driving gear for continuous working photographic copying and treatment machines Expired GB477805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE477805X 1936-04-01

Publications (1)

Publication Number Publication Date
GB477805A true GB477805A (en) 1938-01-06

Family

ID=6542165

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8555/37A Expired GB477805A (en) 1936-04-01 1937-03-23 Improvements in driving gear for continuous working photographic copying and treatment machines

Country Status (1)

Country Link
GB (1) GB477805A (en)

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