US1728102A

US1728102A - Photographic copying machine

Info

Publication number: US1728102A
Application number: US39755A
Authority: US
Inventors: Arthur W Caps
Original assignee: Photostat Corp
Current assignee: Photostat Corp
Priority date: 1925-06-26
Filing date: 1925-06-26
Publication date: 1929-09-10
Anticipated expiration: 1946-09-10

Description

Sept, 10, 1929. A. w. cAPs I PHOTOGRAPHIC COPYING IACHINE Filed June 26, 1925 INVENTOR n mar Patented Sept. 10, 1929.

UNITED STATES PATENT OFFICE.

ARTHUR W. CAPS, OI KANSAS CITY, MISSOURI, ASSIGNOR TO P HOTOSTAT CORPORA TION, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

.PHOTOGRAPHIC COPYING MACHINE.

Application filed June 26, 1925. Serial No. 39,755.

This invention relates to a photographic copying machine, the primary object being to so construct a photographic copying machine that both sides of a sensitized sheet may be presented to a projecting apparatus to enable the operator to photograph on both sides of the sheet. Specifically, the inven tion includes a copy-holder movable in a horizontal plane to bring successive parts v of the copy holder in line with the' projecting apparatus, the movements of the copy holder being effective in imparting movements to a sensitized-sheet holder so that the movements of the copy holder and the sensitized-sheet holder will be synchronized. The present invention contemplates a casing, a projectingapparatus such as a camera, a reversible sensitizedsheet holder in the casing, a rectilineally reciprocatory copy holder outside the casing, and connections between the sheet holder and the copy holder so that when the copy holder is shifted to bring different parts in line with the pro-- jecting apparatus the'sheet holder will be reversed, itbeing understood that the reciprocatory movements of thecopy holder are intermittent because there must be a pause between each half of a reciprocation to provide-time for making the exposure. Thus a novel means is provided for printing on both sides of the sensitized sheet.

The specific construction of the illustrated embodiment of my invention will be clearly understood by reference to the following description in connectionwith the accompanying drawing, in which I The figure is a perspective view of a copying machine constructed in accordance with my invention.

Referring now to the drawing by numer-' als of reference, 1 designates a casing in which is an appropriate support 2 upon which is mounted the turntable 3 of a reversible sensitized-sheet holder 4. The specific construction o f'the sheet holder is immaterial, it being shown as comprising two standar'ds 5 and 6 carrying a roll holder 7 in the .top, and amask 8 below the roll holder determines the efiective area of the sensitized-sheet 8 which is exposed to the proj ecting apparatus shown as a camera 9. The. specific construction of the turntable and holder constitutes the subject matter of a separate application so it is thought that it 1s sufiicient in this application to point out that the sensitized-sheet holder rotates about a vertical axis in line with the center of the projecting apparatus.

The mask 8, consisting of two panels'bev tween which the paper is fed, is rigid with the turntable 3, the turntable being provid ed at its periphery with teeth 3 which mesh with the teeth of the pinion 10 on the stub shaft 11 in the bearing 12 in the front panel of the casing. The stub shaft 11 extends below the bearing and it is connected to a shaft member 13.by a universal joint 14, the shaft member 13 being telescopically secured in the sleeve 15 and held against rotative movement with respect thereto by a lug 16 which works in theslot 17 of the sleeve. The lower end of. the sleeve is con nected to a stub shaft 18 in'bearing 19 carried by the bracket 20 having a universal joint connection 21. The lower end of the shaft ,18 carries a pinion 22 which meshes with a rack 23 on a rcctilineally reciprocatory copy holder. Thocopy holder includes a frame which is supported upon the table 25 by the

supports

26 and 27, the copy holder frame 24' being spaced from the table 25 so that a backing plate or board may be received in the space 28 to press the matter to be copied against the transparent panel 29 of the copy holder. The board for pressing the sheets to be copied against the transparent panel 29- may havesprings 30 on it similar to springs one. blue printing frame. The construction ofthe copy holder, however, is not important so I do not wish to be limited to any particular form' of the copy holder. The copy holder is held rigid with the table but it is adapted to swing on the a hinge supports 27 for the purpose of introducing and removing the sheets to be copied.

The rack, it will be observed, is rigid with. the table 25, the table being movable rectilineally by the operator who may slidethe table along the

channel guides

31 and 32. The table 25 has depending lugs 33, one at a rod or shaft, these shafts being indicated at 34 and 35. They carry on their ends rollers 36 which ride in the channel-

shaped guides

31 and 32 so that the table may easily be moved first in one directionand then in the other.

It will be observed that there is but a single projecting apparatus or camera and that the problem is to expose both sides of the sensitized sheet 8' to the single projecting apparatus. One half of the copy holder will be exposed at each operation, for example, if the parts are in the position shown in the drawing and the left half of the copy'holder is being projected photographically against the sensitized sheet, the half to the right will be the next part projected into the casing 1. When the copy holder is shifted from right to left to bring the right half of the copy holder in line with the prism 37 of the projecting apparatus 9 the rack 23 will turn, the pinion 22 and through it cause the connecting shaft consisting of the

members

13 and 15 to turn, imparting movement to the pinion 10 so as to turn the turntable 3, 180 degrees about its axis to present the opposite side of the sensitized sheet to the projecting apparatus. Then when the exposure is made the right half of the copy in the copy holder will be exposed against an unexposed side of the sensitized sheet. Consequently, both sides of the sensitized sheet may be exposed, and by reason of the connection between the copy holder and the sensitized-sheet holder it will be impossible to expose one side of the sheet more than one time. That is, there can be no double exposure due to the fact that the sensitized-sheet holder has been reversed, because the act of shifting the copy holder will of necessity cause the sheet holder to be reversed. Of course when the copy holder moves over its guides the motion must always be communicated to the turntable on account of the positively geared connections. L

In actual ractice the sheet of sensitized material is ed through the mask and cut off in lengths which ma drop to the bottom of the casing so that t ey may be conveniently collected and developed. The specific form of the sheet severing mechanism is immaterial to the present invention. The table 25 may be raised and lowered upon the guides 38 and 39 to properly focus the copy holder, so for that reason I have made the shaft connections between the copy holder and the sensitized-sheet holder extensibl'e, this being accomplished by the arran ement consisting of the members 13 to 16, oth inclusive.

In so far as the generic embodiment of my invention is concerned the. device is susceptible to difierent constructions, so I donot Wish to be limited to the exact details of construction shown.

Of course it will be understood that the amplitude of movement of the copy holder is fixed so that when the copy holder has moved far enough in one direction to reverse the sensitized-sheet holder it will then be moved back in the opposite direction.

What I claim and desire to secure by Letters-Patent is 1. In a photographic copying machine, a casing, object-projecting means associated with the casing, a sensitized-sheet holder within the casing having means for exposing two sides of the sheet, a rectilineally reciprocatory copy holder outside the casing associated with the projecting apparatus, 1

and means connecting the copy holder and the sheet holder for causing reversing movements of the sheet holder in response to reciprocatory movements of the copy holder.

2. In a photographic copying machine, a

casing, object-projecting means associated with the casing, a sensitized-sheet-holder within the casing having means for exposing two sides of the sheet, an intermittently reciprocatory copy holder outside the casing associated with the projecting apparatus, and means connecting the copy holder and the sheet holder to cause reversing movement of the sheet holder when the copy holder is moved in either of two directions. v 1 3. In a photographic copying machine, a casing, object-projecting means associated with the casing, a sensitized-sheet holder within the casing mounted for reversemovements so that two opposite sides of the sensitized sheet may be exposed to the projecting apparatus, a copy holder outside the casing movable rectilinearly in a plane transverse to the axis of the projecting means, and driving connections between the copy holder and the sensitized-sheet holder to synchronize their movements.

4. In a photographic copying machine, a casing, object-projecting means associated with the casing, a vertically disposed, reversible sensitized-sheet holder within the casing, an intermittently reciprocatory copy holder outside the casing, and connections between the copy holder and the sensitizedsheet holder whereby upon movement of the copy holder, a reversing movement will be imparted to the sheet holder.

5. In a photographic copying machine, a casing,. object-projecting means associated with the casing, a vertically disposed, sensitized-sheet holder in the casing rotatable about a fixed axis having an annular row of gear teeth thereon, a reciprocatory copy holder outside the casing having a rack bar, a pinion engaging the rack bar, a inion engaging the teeth on .'the sheet hol er, and a shaft connected to the pinions.

6. In a photographic copying machine, a casing, object-projecting means associated. with the casing, a vertically disposed, sensitized-sheet holder in the casing rotatable about a fixed axis having an annular row-of gear teeth thereon, a reciprocatory copy holder outside the casing having a rack bar, avpinion engaging the rack bar, a pinion engaging the teeth on the sheet holder, a shaft and universal joints between the shafts and thepinions.

7. In a photographic copying machine,- a casing, object-projectingmeans associated with the casing, a vertically disposed, sensitized-sheet holder in the casing rotatable about a fixed axis having an annular row of gear teeth thereon, a reciprocatory copy holder outsidethe casing having a rack bar, a pinion engaging the rack bar, a pinion engaging the teeth on the sheet holder, a shaft comprising telescopic mem' bers, connections between the ends of the shaft and the pinions, and means for yertically adjusting the copy holder.

8. In a photographic copying machine, a

sensitized-sheet holder comprising a vertically disposed sheet supporting member, a

turntable at the bottom of the member having gear teeth on its periphery, a reciprocatory copy holder, a rack on the copy holder, pinions engaging the teeth on the turntable and the teeth of the rack, and a shaft connecting the pinions.

9. In a photographic copying machine, a sensitized-sheet supporting member, a turntable supporting the member having gear teeth on its periphery, a pinion engaging the teeth, a copy holder spaced from the turntable comprising a frame, a table supporting the frame, a rack on said copy holder, a pinion meshing with said rack, guides forthe table whereby the table may move back and forth to rotate the pinion meshing with therack, and a shaft connecting the pinion engaging the teeth on the turntable and the pinion engaging the rack.

10. In a photographic copying machine,

the combination with a-camera casing, a

sensitized sheet holder arranged in the focal plane thereof, mechanism for reversing the sheet holder, and image projecting means associated with the casing embodying a lens and prism, of a copyholder arranged outside of the casing in a plane angular to the focal plane, supporting means for the copy holder upon which it is movable to present successive image areasto the lens and driving means connecting the sheet holder reversing mechanism and the copyholder for synchronous movement.- I

In testimony whereof I afiix my signature.

ARTHUR w. CAPS.