US1722719A - Printing apparatus - Google Patents

Description

y 30 1929. c. B. mussELL v 1,722,119

PRINTING APPARATUS Filed April 6. 1928 SSheets-Sheet 1 c. B. TRUSSELL 3& 79 r July 30, 1929. c TRUSSELL 1,722,719

' PRINTING APPARATUS Filed April 6. 1928 5 Sheets-Sheet 2 gwumkoz c. B.TRUSSEL L July 30, 1929. c B, TRUSSELL 1,722,719

PRINTING APPARATUS Filed April 6. 1928 3 Sheets-Sheet 3 gwvenlo't C. BVTRUSSELL atknmy Patented July 30, 1929.

PATENT OFFICE.

CLYDE B. TRUSSELL, OF OMAHA, NEBRASKA.

PRINTING APPARATUS.

Application filed April 6, 1928. Serial No. 268,063.

This invention relates to an apparatus for printing or producing photographs and has for its object to provide such a construction that the work of printing on sensitized paper from transparent negatives may be more quickly accomplished than ordinary, the parts to be of such arrangement that opera- .tion will be convenient, and means will be provided for timing the exposure of the sensitized paper.

With the foregoing objects in view the invention presents a new and useful con struction, combination and arrangement of parts'as described herein and claimed, and

as illustrated in the accompanying drawing,

wherein,

Fig. 1 is a plan view of the apparatus, a part of the hood being broken away. Fig. 2 is a view of the apparatus in longitudinal section. Fig. 3 is a view showing a part of one of the sides of the apparatus, being a detail to illustrate the mounting of the pendulum. Fig. 4 is a view of the same taken at right angles to the view shown in Fig. 3. Fig. 5 is a sectional view of the carrier-frame and parts thereon.

Referring now to the drawing for a more particular description, the apparatus is provided with a base 7 having a fiat bottom so that it may rest on a table or other support for use by an operator at the front of the apparatus.

Disposed above and secured to the rear part of the base is a hood 8, the spacing of the hood from the base providing a rectangular recess 9 between said base and hood. Numeral 10 indicates an illuminating element which is disposed .in the hood for directing rays of light toward the recess.

I provide a carrier adapted to be reciprocated manually on the base, said carrier consisting, in part of an apertured, rectangular frame 11 adapted to be moved upon a pair of parallel side-bars 12 of the base, a handle 13 being provided for this purpose.

Seated in therectangular aperture of the carrier-frame 11 is a holder-plate 14, preferably of rectangular form, upon which sensitized sheets 15 may be placed, said plate being secured to a pivot-pin 16 having bearin" in the ends of the frame 11. i

umeral 17 indicates a lug or detent-memher which is secured to the lower art of the frame 11 which limits a rearwar swinging movement of the plate 14, and at 18 is indicated a spring which normally maintains said plate in a position parallel with the carrier-frame 11, one end of this spring being secured to said frame 11 and the opposite end of the spring being mounted on the pivot-pin 16 of said holder-plate, as described, the front part of the holder-plate swings downwardly, and is released, it will swin by action of the spring 18 to approximate a horizontal position, the rear part of said plate engaging the lug or detent l7.

Numeral 19 indicates an apertured, rectangular wing in which a photographic negative 20 may be seated. This wing is pivotally mounted upon the rear part of the carrier-frame, as indicated at 21, and a part of its swinging movement is controlled by a spring 22, one end of this spring being secured to a projection 23 of the carrier-frame and its opposite end being secured to the wing, and as described, the wing and the negative carried thereby may have swinging movements toward the carrier-frame or outwardly therefrom, the tension of the spring 22, preferably, being such that the front part of the wing will normally be disposed above the holder plate 14 and the sensitized sheet 15.

The hood is provided with springs 24 and guides 25. The base is provided with a catch 26, and the pivot-pin 16 is provided at one of its ends with a latch 27.

In operation, the carrier-frame and parts thereon or attached thereto, is moved rearwardly on the base into the recess 9 to permit exposure of the negative and sensitized sheet to the illuminating element 10 to effect the printing. The carrier is then moved outwardly from the recess and after the photograph or printed sheet has been removed and is replaced by a second sensitized sheet, the operation may be repeated, and on account of the arrangement of parts as described the work may be rapidly performed.

It will be understood that while the carrier is moving into the recess 9 the wing 19 will engage the guides 25 and will swing downwardly, the photographic negative 20 engaging the sensitized sheet 15, and as soon as the carrier has entered said recess the negative will be pressed downwardly against the sensitized sheet so that perfect photographing may be accomplished.

Also it will he s en that while the carrier is moving outwardly from the recess the latch 27 of the pivot-pin 16 of the holderplate 14 will be engaged by the'catch of the base, the result being that the holderplate will swing in a circles arc, the front part of said holder-plate moving dowwardly to cause disengagement of the photographed sheet. I

each operation of printing.

While this feature is important for the correct production of photographs, 1i] consists simply of a strand of wirebent between its ends .to provide a coiled spring 29, said strand providing an arm 30 to which the pendulum is secured, and providing a leverarm 31 disposed approximately at rightangles to the arm 30, said spring n9 being loosely mounted on a horizontal pin 32 which projects forwardly of the apparatus from a standard33. v'lhis standard '33 projects upwardly from the hood, and as described the pendulum may swing in an arc,

the center of which is the horizontal pin 32,

the swinging movements of the pendulum' being approximately at right-angles to the sliding movements of the carrier-frame, and therefore conveniently visible by an operator at the front of the apparatus.

The pendulum is actuated by a forward movementof the carrier-frame, and for this purpose a bellcrank lever is mounted pivotally asindicated at 34: upon the guide 35 of the hood,said bell-crank having an arm 35v extending upwardly for a pivotal con-.

nection with a link 36, the opposite end of the link being pivotally connected with tie arm 31. g g a The arm 37 of the bell-crank projects downwardly and forwardly of the apparatus, and the carrier-frame is provided with arcatch 38 which projects outwardly from its end, and in operation, when the'carrier moves toward the recess 9 the catch 38 will engage the lower arm 37 of the bell-crank, and since this arm will be swung rearwardly the arm 3.5 of said bell-cranlrwill be swung forwardly for moving the link 36 longitudinally, and this movement of the link will cause a downward swinging movement of the lever-arm 28 for actuation of the pendulunn V For operation, the spring 29 could be dispensed with, but its use is preferred since it adds'a slight degree of force for moving the pendulum.

The duration of time of the exposure may depend upon the condition of the sensitized .paper sheets, generally three swinging movements of the pendulum being sufficient, and by use of the pendulum an operator may limit the timingfor producing photographs of uniform appearance. J

Vihile I haveshown and described a tim ing device and prefer its use, I do not wish to beunderstood as'limiting myself in this respect, and Imay dispense-with the pendulum andstandard and other parts. of the timing mechanism, if desire V Also since the invention consists principally of the frame, the holder-plate for the sensitized sheet and apertured win-gfor containing a photographic" negative, it is considered that I may, if desired, dispense. with the use of the base 7 the hood 8 and recess 9, and may expose the negative and sensi- 'tized sheet to light derived from any source,

and therefore I do not wish to limit myself 1n these respects, norto form, size proportion of parts or minor details, except as limited by the appended claims.

I claim as my invention,

1. Ina photographic printing apparatus, a base, a hood above and providing a recess between the base and hood, an illuminating element in the hood, a carrier including a rectangular frame, a holder-plate for supporting a sensitized sheet 'pivotally mounted in the frame, means to limit the pivotal movement of the holdersframe in one direction, a rectangular wing hinged to the carrier-frame and having an aperture for receiving a photogra )lllC negative, said carrier-frame being movable, on the base for conducting the sensitized sheet and negative into the recess for exposure to the illuminating element, and means on the vbase forengaging apart of the holder-plate while the carrier-frame is moving outwardly of the recess for moving said holder-plate in a eircles arc to cause disengagement of the sensitized sheet from the holder-plate.

2. In a photographic printing apparatus, a base provided'with a catch, a hood above the base providing a recess beneath the hood, an illuminating elementin the hood, a .carrier consisting of a rectangular frame, a holder-plate for supporting a sensitized shee said plate being disposed withinand pivotally mounted in said frame and provided with a latch, awing having an aper ture for receiving a photographicnegative engaging the catch on said base for moving said plate in a circles arc to cause removal of the sensitized sheet from the holder-plate. 10

In testimony whereof I have aflixed my signature.

CLYDE B. TRUSSELL.

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