US1452996A

US1452996A - Holder for photographic paper

Info

Publication number: US1452996A
Application number: US476805A
Authority: US
Inventors: Norman G Baker
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-06-11
Filing date: 1921-06-11
Publication date: 1923-04-24
Anticipated expiration: 1940-04-24

Description

Apr. 24, 1923. 1,452,996

N. G. BAKER HOLDER FOR PHOTOGRAPHIC PAPER FiledJune ll 1921 \nventor':

His Atto leys.

Patented Apr. 24, 1923.

UNITED sures NORMAN G. BAKER, OF MUSCATINE, IOWA.

HOLDER FOR PHOTOGRAPHIC PAPER.

Application filed June 11, 1921.

To all whom it may concern:

Be it known that I, NORMAN G. BAKER, a citizen of the United States, residing at- Muscatine, in the county of Muscatine and State of Iowa, have invented certain new and useful Improvements in Holders for Photographic Paper; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

This invention is an adjustable holder for flat sheets of material, such as paper, cardboard, etc., and particularly designed for holding sensitive paper during the process of producing enlarged photographs.

The object of the invention is to provide a holder which can be readily adjusted to hold a sheet of any size u v to the maximum capacity of the board, an to hold the sheet at any desired angle on the board, so that if the image happens to be inclined or projected in a slanting manner upon the board the holder can be readil adjusted so that the sheets will be held in exact alinement with the image.

With my board no matter what is the size of the paper and no matter what may be the slant or shape of the negative in the machine, or of the image projected onto the enlarging board, the paper can be held at any angle on the board to fit the image.

I will explain the invention with reference to the accompanying drawings which illustrate one practical embodiment thereof, and set forth in the claims the essential features of construction and novel combinations of parts for all of which protection is desired.

In the drawings:

Fig. 1 is a View of the holder complete, showing it holding a sheet in vertical position in full lines and at an angle in dotted lines.

Fig. 2 is an enlarged section on line 2-2, Fig. 1.

Fig. 3 is an enlarged section on the line 33, Fig. 1.

The board 1 may be of any suitable size and construction, being preferably made of layers of veneer so that it will not warp. This board is provided in its front face with a preferably centrally disposed transverse groove 2, which is preferably angular or ove-tailed in cross section, the base of the groove being wider than the center thereof. The board is also preferably provided with Serial No. 476,805.

a, vertical centrally disposed similar channel 2* extending at right angles to channel 2; and if desired, channel 2 may be smaller than channel 2.

Slidably mounted in the channel 2 are two blocks or slides 3, one at each side of channel 2. To each of these blocks 8 is attached a paper holdi'n plate or strip 4. Each strip 4 is preferab y provided at its inner edge and underside with a slight recess 4 which may be formed by groovin or bending the strip. This recess is adapted to receive the adjacent edge of the sheet of photographic paper which is to be held on the board. Preferably each stri t is piv oted on the block by means 0 a thumb screw 3 which extends through a perforation in the strip 4 and engages the block 3; and a tension spring, preferably a fiat bow spring 8*, may be interposed between the head of the screw 3 and the stri 4.

Each strip 4 is also preferably provided adjacent its pivot 3 with an outwardly projecting portion 4; having a curved slot 44 therein concentric with the pivot 3; and through this slot passes a thumb screw 4 which engages block 3. By tightening screw the strip 4 may be fastened at any desired adjusted inclination to the block 3 or channel 2.

In the channel 2 is an adjustable block 5 to the underside of which may be attached a bow spring 5, the ends of which are adapted to press against the bottom of the groove and cause block 5 to yieldingly bind in the groove. The block 5 is provided on one end with a lip 5 which projects slightly above the surface of the board 1.

The

blocks

3 and 5 are preferably made so that their upper edges will not project quite to the top of the related grooves and so that they will slightly clear the bottoms of the grooves. This will allow for wear and permit the blocks to be bound in the grooves without projecting above the surface of the board. The springs 3 are used to hold the strips 4 yieldingly but closely against the board. and also to bind the blocks 3 yieldingly in the groove 2, to hold the strips and blocks in any position to which they are adjusted.

By loosening screws 4 the strips 4 can be adjusted to any desired angle relative to the groove 2, the strips at turning on pivot screws 3; andwhen adjusted the strips can be fastened in adjusted position by tightening the screw P. The screws 3 can be turned to cause springs 3 to hold the strips closely against the board to prevent the sheets of paper sliding under them while still permitting the strips to be turned either way. Springs 3 will take up any lost motion or wear on the blocks 3; and the spring 5 will similarly compensate for any wear on the block 5.

The operation is as follows. The board is used in upright position as a rule and may be supported uponan easel or in any other suitable manner. When an enlargement is to be made the board is placed on the support and a sheet of still paper or cardboard of the desired size is placed on the board, and the lantern adjusted until the image of desired size is projected onto said sheet. If the image appears crooked or inclined, to the ri ht or left, on the board the sheet is shifte until its longitudinal axis corresponds with the longitudinal axis of the image. The sheet is then held by hand and the block 5 adjusted until the lip 5 engages the lower edge of the sheet so as to support the latter on the board. The guide strip 4 on the ri ht can then be brought up against the e ge of the sheet and adjusted to an angle corresponding to that of the adjacent edge of the sheet and is then fastened by the thumb screw. The other side guide is then moved up and adjusted against the other edge of the sheet and tightened by its screw. This still piece of paper can then be drawn out from between the opposed strips 4, and a piece of sensitized photographic paper of the same size substituted in place thereof. The exposure is then made; the parts as thus adjusted can be used for making one or any number of exposures for like enlargements and all will be properly positioned on the board.

If the blank sheet of paper is stiff enough the guides if loosened would automatically adjust themselves against the edges thereof when pushed thereagainst and could then be fastened in position. Obviously the guide strips can be readily adjusted at any desired angle and to hold sheets of paper of any desired size up to the grooves maximum.

The board may be made of any desired size. For making a 16x20 enlargement it needs to be only 16 inches long as the guides can be moved to the outermost edges of the slots, but the board would have to be more than twenty inches wide to allow for the width of the guide at the center.

Obviously the invention is not restricted to the specific construction and arrangement of the parts shown as this could readily be varied while maintaining the essential features and advantages of the invention.

What I claim is:

1. An adjustable holder for the purposes described comprising a board, a pair of par allcl guide strips adjustable on the board to or from each other and adjustable at any desired angle relative to the vertical axis of the board adapted to support and position a sheet of paper between them, substantially as described.

2. In an adjustable holder as set forth in claim 1, an adjustable device between the guides for supporting the lower edge of the sheet.

3, In an adjustable holder for the purpose described a board, a pair of parallel opposite pivoted guide strips, and means for adjusting the strips on the board to or from each other and at any desired angle relative to the vertical axis of the board, said strips being adapted to support and position a sheet of sensitized paper laid between them, substantially as descrlbed.

4. In a holder as set forth in claim 3, an adjustable device between the guides for supporting the lower edge of the sheet.

5. In a holder for the purpose specified, a board having a groove, blocks adjustable in the groove, and sheet holders connected to the blocks and adjustable therewith to or from each other.

6. In a holder as set forth in claim 5, an adjustable device between the guides for supporting the lower edge of the sheet.

7. In a holder for the pn ose specified, a board having a groove, bloc s adjustable in this groove, a sheet holding strip pivoted on each block and adjustable therewith to or from the other; and means for holding the strips at any desired angle to the groove.

8. In a holder as set forth in claim 7, an adjustable device between the guides for supporting the lower edge of the sheet.

9. A board for the purpose specified having a transverse groove, and a longitudinal groove; blocks slidably mounted in the transverse groove, sheet holding strips respectively fitted on the blocks and adjustable therewith to or from each other, and adjustable at any desired angle to the blocks; an adjustable block in the longitudinal groove, and a sheet supporting member attached to this block, substantially as described.

10. In a device as set forth in claim 1 spring means engaging the strips to hold them yieldingly in adjusted position.

11. In a device of the character set forth in claim 5, a strip pivoted on each block and having an are shaped slot concentric with the pivot of the strip, and a screw passing through the slot and engaging the block to fasten the strip. I

12. In a device of the character set forth in claim 5 a strip pivoted on each block and having an are shaped slot concentric with the pivot of the strip; a screw passing through the slot and engaging the block to fasten the strip; and spring means engaging 1,sss,ese

w Weeks to fasten the strips thesete 15. In a device (if the character in claim 9, the strips having an: s1 concentric with their pivets, screws L sssing tht'eugh the slots and engaging the blacks fasten the strips thereto and spti gaging the strips to hold them yieic lingiy in w usted position,

In testimony that I claim the my ewn I stfix my signature.

, NURMAN G,