US1440622A

US1440622A - Photographic-printing machine

Info

Publication number: US1440622A
Application number: US496349A
Authority: US
Inventors: Clarence H Owen
Original assignee: Eastman Kodak Co
Current assignee: Eastman Kodak Co
Priority date: 1921-08-29
Filing date: 1921-08-29
Publication date: 1923-01-02
Anticipated expiration: 1940-01-02

Description

Jan. 2, 1923. 1,440,622

C. H. OWEN PHoroGRAPHIc PRINTlNc MACHINE. FRED Aus. 29. i921.

ATTORNEYS.

WITNESS -illl Patented Jan. 2, 1923.

UNITED STATES PATENT OFFICE.

CLARENCE H. owen, or noonnsrnn, Nnwuomr, Assrearon 'ro BAs'rmAn xoDAx COMPANY, or noenmmn, NEW Yonx, A CORPORATION or NRW Yonx. y

PEO'EDGBAFHJQ-PRINTIHG MACHINE- Applloation tiled August 29,

To all whom t may comer/1,: y

Be it known that I, CnAnnNon H. OWEN, a citizen of the United States of America, re-y siding at Rochester, inthe county of Monroe and btate of New York, have invented certain new and useful Im rovements in Fhotographic-Printing Mac ines', of which the following is a full, clear, and exact speciication.

This invention relates to photography, and more particularly to photo raphicy printingA machines, and has for its o ]ect to provide a simple, compact and durable yinachine for rapidl making contact prints from either glass or negatives. To these ends the improvements are directed particularly to the means for automatically actuating the platen which presses the paper agains the negative; to means for varying the duration of the printing time; to means for automatically retaining-the platen in operative position; and to means for accom lishing the steps of lowering the platen, ightln the lamp, holding the platen closed and nally raising the laten with the least possible ef.- fort upon t e pant of the. operator. With these and other objects in View, the invention consists in Certain improvements and combinations of all as will be hereinafter more fully escribed, the novel features being pointed out in the claims at the end of the specification.

ln the drawing, in which like characters designate like parts throughout:

Fig. 1 is a perspective view of a p rintii machine constructed in accordance with an illustrating one embodimentof my invention;

Fig. 2 is a section on the line ll-I of Fig. 1; and

Fig. 3 is a wiring diagram.

The printing machine consists of a .cabinet 1 having a slanting front or frame 2 in which a printing panelv 3 is mounted, the panel being constructed preferably of heavy glass, as shown, mounted flush with the frame 2. A platen designated generally as 4 is carried by arms 5 and, 6 and can be moved to and from panel 3 as arms 5 and 6 turn with a shaft 7, which is carried in brackets 8 afiixed to front 2. A coiled spring 9 normally tends to hold the platen raised, :is shown in Fig. 2. the force applied being in the direction of the arrow lin Fig. 1. The

1921. Serial` N9. 4949.

outer ends of levers 5 and 6 are connected by a rod` 1.0 which projects through slots 11 in lugs l2, cast onthe platen back 13. .This is faced with felt 14 or other soft material, Leaf springs 15-15 pass under rod 10 so as to keep the rod normally at the top of slots 11, these springs being compressed when the platen is lowered upon the panel in o erative position. Pins 16 on the rear of p aten back 13 are loosely fitted into slots 17 of arms 5 and 6, and are merely for preventing platen 4 from rotating about rod 10. As the 'arms are lowered afcontinuation of the closing movement (that of lowering the platen upon the panel) compresses springs 154-15 which both insures proper Contact between a negative and printing paper and allows a slight universal movement of the platenA with respect to the panel, thus automatically caring for the varying thicknesses of dilferent plates, lilms and papers.

' One of the lever arms, 5, is part of al bell crank lever 18, the other arm 19 of which passes throu h aslot 20 in the frame 2 of the cabinet, tlliere being a yoke 21 on the end of arm 19. Bot of the arms 5 and 6 are pinned to shaft by pins 22. In order to actuate the platen I connect arm 19 b means of a link 23 to a plunger 24 which forms the core of solenoid 25. This solenoid is carried by yokes 26-26 attached to a supporting block 27. The

solenoid terminals

28 and 29 are attached to

wires

30 and 31, and are connected to a source of power, diagramniatically illustrated at 32. Both wires 30 and 3l have one terminal at an oil switch. being fastened thereto by nuts 33 and 34. The oil tank 35 supports terminals 36 and 37, against which a switch bar 38 contacts When raised by rod 39, link 40 and arm 41 of bellv crank lever 42. This lever is pivoted at 43 to a support 44 extending up from oil tank 35.

An actuating rod 45 connects push button 46 to arm 4T of bell crank lever 42, and a spring 48 keeps the button pressed outwardly. To energize the solenoid it is only necessary to push vthe button. l find anvoil switch convenient because it prevents arcingr and thus reduces the fire hazard, but any other convenient type of switch may be used in itsplace.

llnder panel 3 there is :i reiector 49 adapted to cast the light rays from lamp 5.)

platen,

evenly `over the printing` panel. rlf'his lamp is connected to the source ot `power 82 by Wires 5l and 52 the latter passing,` through a switch 5B. A, `plunger makes the circuit when pressedinwardly, and is of the variety which springs outwardly automatically. As

the plunger is in the path ot arm 19 oitA- bell crank lever i8, the lamp '5G is lighted each time the platen is lowered. The base block 5l is adjustable along; the top 52 or cabinet l, as it is slotted` at 53 and nuts can be'loosened to permit of sliding,` the block 5l ln this Way the lamp timingcan be synchronized with tlieplaten, the parts ning adiusted so that lamp 50 will be 1' er proper contact is secured. bo.

Y circuitsabove described.

To eliminate the jar due to the solenoid rapidly moving' the platen, l provide a shocl absorber in the l'orm ot a dash pot 65 hinged at 3o to the cabinet l. Plunger is pivoted to arm 19 oit the bell crank lever, and its speed ot movement into the dash pot is regulated by the adjustable vent 68.

. lll/lith the machine as above described an operator needs only to adjust thepaper and negative and press the buttonto lower the light the lamp, and maintain printing` contact, and to release the button to raise. the platen andextinguish the printing` lamp. rlhe time necessary for printing,` is controlled by merely holding` in the push buttonv l contemplate providing a completeprinter with negative clamps, masks, etc., but as these form no part of the present invention, they are omitted Vtrom the drawing.

Having thus described my invention, what l claim as nenY and desire to secure by Let-` ters latent is:

l.. ln a photographic printing,1 machine, the combination with a support, and a printing' panel mounted thereon, of a platen pivoted to the support to move to and from the 'printing panel, means for moving` the platen, a solenoid, said means being actuated by the solenoid, an electric circuit including a hand switch and the solenoid, enabling` an operator to lower the platen and hold it in Contact under pressure upon the printinp` panel by making` the circuit with the switch.

2. ln a photographic printing machine, the combination with a support, and a printing panel'mounted thereon, of a platen pivoted to the support to move to and from the printing; panel, a lever for operating the pir-tten, a solenoid connected to said lever for Vmoving` the platen in one direction. a spring; for moving the platen in the opposite direcing` the circuit, raise the platen trom the printing panel at Will.

ln a ahotoora hic nrintin machine c; l b a the combination with a trame and printing panel mounted thereon, of .a platen pivoted to the frame `and movable to and from an operative position with respect to the printing panel, a solenoid ttor movingthe platen into an operativo position, printing; lamp adapted to be lighted when the platen is in operative position, andjmeans including an electric circuit and a hand switch for an operator to manually control will the duration oi the exposure by holding the switch in position to malte the circuit, thus energizing the solenoid and causing it to lower the platen to an operative position in which the printing lamp is lighted.

e. In photographic printing machine, the combination with a frame and a printing panel mounted thereon, ott a platen hinged to moveto and 'from anl operative position over the panel, a lever connecting' the platen to the frame, with a spring tor moving' the platen in one direction, i and a solenoid tor moi/img the platen in the direction, a printing` lamp adapted to be lighted when the platen has reached its opera tive position, an electric circuit including the solenoid, with a single manually operated .switch by which an operator controls'at will each step ol the entire cycle ol2 movement ci the machine, making,- the circuit to first, lower the platen to the 'printing panel, second, to `hold the platen under pressure in its operative position, and finally breaking: the circuit to release the platen and return it to its inoperative position. i y ln a photographic printing machine. the combination with a. iframe and a prioti panel mounted thereon, of a platen inoY to and from an opera ims'ticn over l panel, a.. lever for movingv the platen. a solenoid for moving; the lever, there being;- a

.shock absorber :tor limiting' the shock oi the suddenly applied'torce ot the solenoid upon the platen as it is moved to a position drei' the panel.

6. In a photographic printing;` machine, the combination With a :trame and a printing; panel mounted thereon, of a platen hinged to the trame movable to and from an operative position with respect to the printing; frame, a platen moving means including a solenoid, there being, a solenoid controlling; means comprising a dash pot for limiting` the 'force and speed of operation of the sole/, noid as it moves the platen.

7. ln a photographic printing machine,

the combination with a printing panel, of a platen hinged to move to and from an operative position in contact with the printing panel mounted in the frame, of a platen hinged to the frame to move to and from an operative position over the printing panel, a solenoid for actuating the platen in one direction and a spring for moving the platen in the other direction, an electric circuit including a source of power, the solenoid, and a manually operated two-contact switch movable to make the circuit by which the movements of the platen are controlled, the switch being moved to make the circuit to lower the platen and hold it under pressure against the printing frame and moved to break the circuit to allow the spring to move it from the printing panel.

9. In a photographic printing machine the combination with a frame having a printing panel mounted therein, of a platen hinged to the frame and movable to and from an operative position over the printing panel, a platen moving means including a solenoid, an electric circuit including the solenoid and a switch, there being connections between the solenoid and the platen to move the latter about its hinge as the solenoid is actuated when the circuit is closed by the switch.

10. In a photographic printing machine, the combination with a frame and a printing panel mounted on the frame, of a platen i" hinged to the frame and movable to and from an operative position over the frame, platen moving means including a solenoid, and connecting members between the platen and the solenoid, whereby the platen is turned about its hinge when the solenoid is actuated.

11. In a photographic printing machine,y

the combination with a frame and a printing panel mounted on theframe, of a platen hinged on one side of the frame and movable to and from an operative position over the printing panel, a solenoid including a reciprocating plunger on' the other side of the frame, and connections between the solenoid plunger and the platen whereby the reciprocating movement of the plunger will cause the platen to move about its hinge.

12. In a photographic printing machine, the combination with a frame and a printing panel mounted on the frame, of a platen hinged to one side of the frame and movable to and from the printing panel, a spring for moving the platen in one direction, means for moving the platen against the spring action including a solenoid, there being connections between the solenoid and the platen whereby the latter is moved about its hinge against the action of the spring when the solenoid is actuated.

13. A photographic` printing machine,`

comprising a printing panel, a platen movable into printing position on said panel and removable from said panel to clearance position to permit manual access to the space between it and the panel, means, including an electro-magnetic source of motive power, for moving said platen to printing position, holding it in such position, and removing it to clearance position, a control member the` actuations of which are manually governed, and connections, includinga device for regulating the current to said source between said member and said means which govern the means to move said platen to printing position upon manual actuation of the control member, to remove said platen to clearance position upon further actuation of said member, and to retain said platen in printing position between said actuations.

14. A photographic printing machine, comprising a printing panel, a platen movable into printing position on said panel and removable into clearance position from said panel to permit manual access to the space between said platen and panel, means, including an electro-magnetic source of motive power, for moving said platen to printing position, holding it therein, and removing it to clearance position, a control member movable to different positions, the movements of which are manually governed, and connections includin a device for regulating the current to sai source between said member and said means which govern said means first to move the platen to printing position when said member is manually moved to one of its positions, then to retain said platen in printing position while the member remains in said one position, and then to remove said platen to clearance position when said member is moved to a different position.

Signed at Rochester, New York, this 24 day of August, 1921.

CLARENCE H. OWEN.