GB227896A - Improvements in and relating to photographic printing apparatus for the preparation of photomechanical printing surfaces - Google Patents

Improvements in and relating to photographic printing apparatus for the preparation of photomechanical printing surfaces

Info

Publication number
GB227896A
GB227896A GB2608523A GB2608523A GB227896A GB 227896 A GB227896 A GB 227896A GB 2608523 A GB2608523 A GB 2608523A GB 2608523 A GB2608523 A GB 2608523A GB 227896 A GB227896 A GB 227896A
Authority
GB
United Kingdom
Prior art keywords
frame
rule
edges
index marks
bars
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
GB2608523A
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.)
ARTHUR MOSCROP HUMPHREY
HUNTER S Ltd
Original Assignee
ARTHUR MOSCROP HUMPHREY
HUNTER S 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 ARTHUR MOSCROP HUMPHREY, HUNTER S Ltd filed Critical ARTHUR MOSCROP HUMPHREY
Priority to GB2608523A priority Critical patent/GB227896A/en
Publication of GB227896A publication Critical patent/GB227896A/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

Abstract

227,896. Hunter's, Ltd., and Humphrey, A. M. Oct. 1923. Contact printing-frames.-A printing-frame 1, Fig. 1, for making one or a number of photographic prints in predetermined positions on a zinc or like sensitized plate, from a negative or negatives 22, has two adjacent true edges 3, 4 at right angles, and is mounted in trunnion or like supports 2. A rule formed of two graduated parallel bars 6, 7 joined at their ends by a bridge piece, 8, Fig. 5, slides along the true edges, and can be given a set position on the frame 1 by means of clips 10 attached to the true edges 3, 4 and fitting between the bars 6, 7. The rule has a cursor or cursors 13 provided with index marks 14, 15, Fig. 2, and a locating centre 2, 3, and looking screws. Both rule and cursor may have verniers. More than one rule may be provided when the frame is not square shaped. A lens may be provided for reading the locating centre 23. The rule has at one end stop pieces 9 for engaging the outer edge of the frame 1, together with springs 17 which pull the surfaces 5 of the rule against the straight edge, so that only one edge is used for setting purposes. The rule lies above the negatives 22, which have setting marks 19, 20, and rest on a glass plate 21 carried by the frame 1. The Provisional Specification describes also the use on the frame of straight edges having index marks for example at their middle, or a graduated scale, together with index marks on the opposite side of the frame for adjusting the zinc plates into position in which they are held by clips on slotted bars adjustably secured to the sides of the frame.
GB2608523A 1923-10-19 1923-10-19 Improvements in and relating to photographic printing apparatus for the preparation of photomechanical printing surfaces Expired GB227896A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2608523A GB227896A (en) 1923-10-19 1923-10-19 Improvements in and relating to photographic printing apparatus for the preparation of photomechanical printing surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2608523A GB227896A (en) 1923-10-19 1923-10-19 Improvements in and relating to photographic printing apparatus for the preparation of photomechanical printing surfaces

Publications (1)

Publication Number Publication Date
GB227896A true GB227896A (en) 1925-01-19

Family

ID=10238104

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2608523A Expired GB227896A (en) 1923-10-19 1923-10-19 Improvements in and relating to photographic printing apparatus for the preparation of photomechanical printing surfaces

Country Status (1)

Country Link
GB (1) GB227896A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633076A (en) * 1949-05-05 1953-03-31 Rudolph Platzer Plate aligning attachment
US3434217A (en) * 1966-05-02 1969-03-25 James J Abbott Jr Pre-register apparatus for printing press

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633076A (en) * 1949-05-05 1953-03-31 Rudolph Platzer Plate aligning attachment
US3434217A (en) * 1966-05-02 1969-03-25 James J Abbott Jr Pre-register apparatus for printing press

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