US3463586A - Photographic copyboard - Google Patents

Description

Aug. 26, 1969 C. F. CARLSON ET AL PHOTOGRAPHIC COPYBOAHD Filed June 30, 1966 Auuw SCH/P0505? C-HEJZEY 644 450 INVENTORS United States Patent 3,463,586 PHOTOGRAPHIC COPYBOARD Chesley F. Carlson and Allyn Schroeder, Minneapolis,

Minn., assignors to Chesley F. Carlson Company, Minneapolis, Minn., a corporation of Minnesota Filed June 30, 1966, Ser. No. 561,879 Int. Cl. G03b 27/62, 27/64, 27/20 US. Cl. 355-76 2 Claims ABSTRACT OF THE DISCLOSURE (lover.

This invention relates to a novel and improved copyboard adapted for a variety of operations attendant upon photography. The copyboard may be employed to support an original or text at a proper focal distance from a camera.

Objects and advantages of the invention will be set forth in part hereinafter and in part will be obvious herefrom or may be learned by practice with the invention, the same being realized and attained by means of the instrumentalities and combinations pointed out in the appended claims.

The invention consists of the novel parts, construction arrangements, combinations and improvements herein shown and described.

The novel features of the invention will appear more fully hereinafter from the following detailed description when taken in conjunction with the accompanying drawings. It is expressly understood that the drawings are employed for purposes of illustration only and are not designed as a definition of the limits of the invention, reference being had for this purpose to the appended claims.

The device is an improvement over the photographic apparatus disclosed in application Ser. No. 457,400 of Chesley F. Carlson.

The accompanying drawings referred to herein and constituting a part hereof illustrates one embodiment of the invention and together with the description serve to explain the principles of he invention.

In the drawings:

FIGURE 1 is a top plan view of the essential parts of a copyboard in position for holding a print or the like, to be photographed by a camera;

FIGURE 2 is a perspective view of a copyboard showing location of pins therein;

FIGURE 3 is a perspective view showing the backside of the improved copyboard insert;

FIGURE 4 is a perspective view of the copyboard insert showing the front or face side of the insert of FIG- URE 3;

FIGURE 5 is a sectional view taken on lines 55 of FIGURE 4; and

FIGURE 6 is a sectional view similar to FIGURE 5 with the copy holding pin depressed.

In general, initial control of the register should begin in many jobs in the art preparation or paste-up of copy. With pin register control used in the vacuum back of camera, stripping, platemaking, etc., would greatly be expedited if such control included the copyboard of a camera. A purpose of the improvements is to provide a 3,463,586 Patented Aug. 26, 1969 means of establishing a register control system for the copyboard.

As shown in FIGURE 1, 10 indicates a bed upon which is supported the bellows 12 of a camera unit generally designated as 14. The bed 10 supports the copyboard 16 and in the position shown carries the material to be photographed by the camera 14.

The bed 10 could extend into a dark room through a wall with the back of the camera Within the dark room. The bed 10 of course extends into a room adjacent the dark room and has mounted thereon the copyboard 16. The copyboard is generally pivotally mounted as shown in US. Patent 2,554,712, so that it can be moved from a vertical exposure position to a horizontal loading posi tion. The copyboard is moveable along the bed 10 in relationship to the camera.

It will of course be understood that a suitable lens carried on an adjustable carriage 20 which slides on the unit 18 is provided for the camera 14, the lens unit being bed or frame 10. Any source of light may be utilized such as light 19.

The copyboard 16 comprises a suitable base frame 22 which supports a transparent rectangular plate 25, and a top frame member or cover 24 carrying a transparent plate such as glass sheet 26. The frame member 24 is hinged to the base frame 22 in any suitable manner known in the art.

Suitable means at the upper edge of two frame members for locking the overlaying frame member 24 to base frame 22 together. The locking means used may be that shown in the patent referred to above.

In the base frame 22 adjacent the edges are positioned two or more locating elements or pins 28. Two pins 28 may be used but it is preferred that three pins be employed as shown in FIGURE 2.

FIGURES 3 and 4 show my new insert or pressure pad to be employed with the copyboard 16. The insert generally shown at 30 comprises a sandwich construction of two sheets or plates of relatively rigid light transmitting material. These sheets 32 and 34 may be made of glass, plastic or any other suitable material. Positioned between sheets 32 and 34 and adhesively attached thereto is elastic cushion 36 or it can be urethane which has proven very satisfactory. The member 36 may be any suitable material that will permit light to pass therethrough. The material 36 must permit light to penetrate and have the characters of being compressed when pressure is applied and returning to the original shape when the pressure is removed.

The sheet or board-like member 32 has openings 38, 40 and 42 drilled or punched therethrough for the receptiori of pins 28. These openings must have a definite relationship to pins or nibs carried by the sheet or boardlike 34. The sheet or board-like 34 has positioned therethrough nibs or pins 44 which project above surface of the sheet when not under pressure. It is to be understood that more than two pins 44 may be employed in board 34. The pins 44 are located by means of opening in the sheet or board 34. The pins are mounted on a thin base on panel 46 shown in FIGURES 4 and 5. The pins are secured in about the center of the bases 46. The bases are generally flexible and may be of .010 stainless steel. The bases 46 rest on the compressible center layer 36 and the base is of a size much larger than the pins or nibs 44.

Under pressure by the cover of the copyboard the pins are forced downwardly into the compressible material 36 until the tops of the pins 44 are substantially parallel with the top of the material to be photographed. When the pressure is released on the pins the compressed cushion 36 returns the pins to the raised position shown in FIGURE 5.

The pins or nibs 44 are positioned in the insert 30 so as to bring the material to be photographed into alignment with the axis of the camera lens whenever the material is of a predetermined size and positioned properly in relation to holes either punched through the material to be photographed or to tabs, with prepunched holes, that are taped to the material to be photographed.

The positioning of such material to be photographed by means of placing holes over pins 44 sets up a relationship with prepunched film positioned over fixed pins in the vacuum back of the camera. In this manner a continuity of register control is obtained from art preparation to copyboard to prepunched film and to the negative exposed under these conditions.

The art work, keyline drawing, paste-up copy, or other work sheet to be photographed has holes punched therein or prepunched tabs are taped to such material. The insert or vehicle 30 is positioned in the copyboard by placing the pins 28 into holes 38, 40 and 42. This establishes a proper relationship of pins 44 to the axis of the lens of the camera. The material to be photographed is then placed so that holes therein are over pins 44. The cover of the copyboard is closed which forces the pins 44 into the position shown in FIGURE 6. This sets up an overall compression on the insert 30 which provides a pressure of copy against the glass 26. The cameraman then positions prepunched film over pins in the vacuum back of the camera 14 to establish a relationship between the copy in the copyboard and the film in the vacuum back of the camera. A normal exposure is made on the film. If a subsequent exposure is to be made on the same piece of film the second piece of material is positioned over pins 44. The subsequent exposure then provides an exact register of the two images on the prepunched film in the vacuum back of the camera. This operation gives a continuity of register control from art preparation through the copyboard and onto the film.

The use of light penetrating materials 25, 26, 32, 34 and 36 permit the use of reflected light as well as transmitted light in the process. It is to be understood that any translucent material may be used at 25, 26, 32 and 34.

While a single form of the invention has been illustrated and described, it is to be understood that the invention is not limited thereto. As various changes in the construction and arrangement may be made Without departing from the spirit of the invention, as well as be apparent to those skilled in the art, reference will be had to the claims for a definition of the limits of the invention.

What is claimed is:

1. A photographic copyboard comprising in combination a base, a cover hingedly connected to said base, a set of upstanding locating elements provided on the base, and a resiliently yieldable and light penetrable pressure pad removably positioned between said base and said cover for uniformly pressing an apertured work sheet against the cover and locating the work sheet in position when the cover is closed, said pressure pad comprising light penetrable lower and upper rigid plates, a light penetrable cushion of resilient material sandwiched between and adhesively secured to said plates, the lower plate of said pad being provided with openings receiving said locating elements therein when the pad is positioned on said base, and resiliently retractable locating pins projecting from the upper plate of said pad into apertures of a work sheet, said locating pins being retractable by closing of said cover upon said pressure pad.

2. The device as'defined in claim 1 wherein said locating pins are slidable through apertures formed in upper plate of said pad and are resiliently urged to their projected position by said cushion.

References Cited UNITED STATES PATENTS 1,745,900 2/1930 Lowen 8824 2,599,859 6/1952 Ogg 8824 NORTON ANSHER, Primary Examiner RICHARD A. WINTERCORN, Assistant Examiner US. Cl. X.R. 355-92

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