US1466766A

US1466766A - Means for photographically reproducing printed matter

Info

Publication number: US1466766A
Application number: US496924A
Authority: US
Inventors: Stewien Max
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-03-13
Filing date: 1921-08-30
Publication date: 1923-09-04
Anticipated expiration: 1940-09-04
Also published as: FR529810A

Description

Sept. 4, 1923. 1,466,766

M. STEWI EN MEANS FOR PHOTOGRAPHICALLY REPRODUCING PRINTED MATTER Filed Aug. 50. 1921 wmlmm Inventor:

Patented Sept. 4, 1923.

UNITED STATES m STEWIEN, CHABLOTTENBUBG, NEAR BERLIN, GERMANY.

mus roa rnoroemnrcapnr anraonucme ranrrnn m'r'rna.

a lication fled August so, 1921. semi no. 496,924.

(GRANTED UNDER TEE PROVISIONS OF AGT'OF [ARCH 3, 1921, 41 STAT. I.., 1313.)

To all whomit may concern: Be it known that 1, Max STEWIEN, a citizen of the German Republic, ,and resident of Charlottenburg, near Berlin, Germany,

5 have invented certain new and useful Improvements in and Relating to Means for Photographically Reproducing Printed Matter (for which I have filed applications in Germany March 13, 1914, November 24,

10 1920, and March 1, 1921; in Great Britain January 7, 1921, andv in France January 14,

1921), of which the following is a specification. 1

This invention relates to photographic reproduction of printed matter particularly from text books and has for its purposeto provide adevice which is simple in construction and manipulation and which allows quick working.

The invention is illustrated on the accompanying drawing wherein Fig. 1 is a sectional elevation of a reproducing device in accordance with the in- -vention.

Fig. 2 shows a film spool and a bearing for same in sectional top view. Fig. 3 shows lateral views of the film spool of Fig. 2 and of its bearing.

Fi ."4 is a transverse section through winding roller for the exposed film showlng theconnection of the film with the roller.

Fig. 5 is a sectional elevation of the wind L ing roller with bearing of Fig. 4 having connected thereto a portion of a film.

' Fi 6 shows a gripping device for photogra is.

and a reproduction camera. The frame for supporting the book and for holding its leaves comprises. two .pilla'rs 1 (of which only one is visible on the drawing) between which a suction surface 2 is held in uprightv position.

4 arranged a rotatable table 3 sup orted on its lower side b aguide tube wit toothed rack 4. The tn 4 is guided in a sleeve 5 and can bemoved up and down in the same by means of a suitable gear. 6 are mercury 55 lamps arranged in front of the suction sur- .A book containing the'originals to be'reproduced is put on table 3 which is so adusted in height and in angular position that the inner edge of a leaf to be reproduced .just comes below the lower edge of the suction surface. Thereafter suction is started and the leaf is raised so that it is firmly held against the suction surface. This being done an exposure is made and a suitable portion of the film wound on roller 9. For photographing the back side of the leaf, the leaf is turned over and the table rotated for 180. On again raising the leaf the back side of same comes into exposing position.

xposures may be made in quick succession and the exposed film wound on roller 9.

It is essential for quick working that the mechanism is of simplest form. This requires before all easy insertion of the film ool anda construction whereby an automatic slight bra-king effect is exercised on the spool securing the film against unintentional unwinding.

To this end the front discs of the film spool which guide the film are provided with two pins 13 having an angular displacement from each other different from 180. By means of said pins the spool is held in annular grooves 14 of bearing members 15. The two pairs of supporting pins give on withdrawing the film or paper a slight braking efi'ect.

The winding roller 9 is provided with a steel sheet 16 fastened thereto having at its free end a clau'iping device 17 adapted to clamp the endof the film. 18 is a cut out adapted to receive clamp 17. p

In order to allow quick development it is .necessarv that the several exposures made Under the suction surface 2 is on the film or paper strip are as far as. possible alike. This requires the possibility of a control of the exposed film. To this end rotatable arm 11 with ping device 19 and handle 20 is provided iiv hich allows seizing' and transporting of a piece of film sep arated from the film by the cutting device. This consists of the above mentioned knife 12 and two further knives positioned trans versely to knife 12. The particular form of knife 12 allows to make a cut in the middle part of the film only between

knives

21, 22 which are adapted to make longitudinal cuts; on repeatedly operating knife 12 it becomes possible to separate 011' a piece of the film so as to examine the degree of exposure. 23 is a protecting strip under spring tension secured to the

film gripping device

11, 19, 20 and closing the guiding slot irrespective the position of arm 11.

That I 'claim is:

1. In a device for photographically re producing printed matter particularly from text books in combination with a reproduction camera, a suction device having a plain suction surface directed toward the objective of the camera, a table forming a support for the original to be reproduced, and means for adjusting the height of said table independent from the camera.

2. In a devicefor photographically reproducing printed matter particularly from text books in combination with a reproduction camera a frame comprising a rotatable table forming a support for the originals to be reproduced and a suction chamber provided with a plain perforated suction surface above said table in such relation to the table and to the camera that opposite sides of leaves of abook placed on the table can be brought in succession to engagement with the suction surface by turning and, suitably adjusting the rotatable table and reproduced in that position.

3. In a reproduction camera particularly.

for reproducing printed matter from text books a film spool, a film transporting lever rotatably mounted in the camera casing provided with gripping devices adapted to be operated from outside the casing, the lever movable within aslot of the casing and connected with ribbons under spring tension for keeping the slot in the casing tlghtly closed operating with each other that film pieces can be seized by the film transporting lever and removed from the film.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

MAX STEWIEN.

Witnesses Ennnnann Faamano, Fnrrz SCHMIDT.