US834490A - Printing-machine. - Google Patents

Description

Not 834.490. PATENTBD 00T. so, 1906.

l LVM. RASVH.

, PRINTING MAGHINB. AP'PLICKATION FILED 0OT.14, 1905.

THE Nonms PETERS ca. wAsmNoroN, u, c.'

UNITED STATES PATENT' OFFICE.

PRINTING-MACHINE.

Specification of Letters Patent.

Patented Oct. SO, 1 906.

Application filed October 14, 1905. Serial No. 282,806.

T0 all whom, it may concern:

Be it known that I, LEONARD M. RAsI-r, a citizen of the United States, residing at Los Angeles,in the county of Los Angeles and State of California, have invented new and useful Improvements in Printing-Machines, of which the following is a specification.

My invention relates to a machine for printing on sensitized paper 5 and the objects are to provide a machine in which printing may be done by the aid of artificial light and in which the passage of the work through the machine will be accomplished in the time required for the proper exposure of the sensitized paper to produce a good print.

I accomplish these objects by the machine described herein, and illustrated in the accompanying drawings, in which- Figure 1 is an end elevation of myimproved machine. Fig. 2 shows the other end of a portion of the machine shown in Fig. 1. Fig. 3 is a section on the line 3 3 of Fig. 1. Fig. 4 is a sectional detail view of a portion of the mechanism shown in the other figures.

In the drawings in the frame 5 are mounted short hollow shafts 6 and 7, to which are secured a plurality of mercury-vaporlamps 8, which are connected by wires 9 and 10 to a source of electrical energy. (Not shown.) These wires pass through the hollow shafts, so as not to engage the spiders 11 and 12, revolubly mounted on said hollow shafts. In the outer end of the arms of these spiders are adjusting-slots 13, through which pass bolts 14, which bolts also pass through clamping angle- blocks 15 and 16, which hold the hollow glass cylinder 17 firmly in place and secured to the spider-arms. These slots allow for securin cylinders in the machine, which vary slight y in diameter. In the frame is mounted driving-roller 18 and guide-roller 19, around which pass a band of cloth 20, which forms a traveling belt and may be as wide as the distance between the external clamping angle-blocks, which hold cylinder 17 in place in the spiders. A tension-roller 21 is also pivotally mounted in the frame by arms 22, so that its weight bears upon the cloth to keep it in tight contact with the exterior surface of the glass cylinder. A gear 23 is secured to one end of roller 18 and meshes with a worm 24 on the end shaft 25, on which shaft is mounted cone-pulley 26. On shaft 27 is mounted the reverse cone-pulley 28. On shaft 27 is the driving-pulley 29, to which power is applied to rotate pulley 28.

A belt 30 connects the two cone-pulleys and transnits the n .oticn of pulley 28 to pulley 26, whereby through the connecting n-echanisln cloth 20 is caused to travel.

In the operation of n y niachine the iiexible negative containing the matter which it is desired lto print and the sensitized paper are fed into the machine from the table 33. A guide 34 causes the work to pass between the glass cylinder and the cloth as the saire is slowly traveling, and it passes through the machine. During this time the current is turned through the lan-ps, and the light given out by the lamps causes the sensitized paper to be affected in the same manner as if exposed to sunlight. The speed of the conepulleys is regulated so as to cause the travel of the work in front of the lights in the time required for the proper exposure of the sensitized paper, regard being had to the transparency of the material of the negative. By this construction it is always possible to do such print-work at any time, day or night The use of the traveling cloth and hollow glass cylinder keeps the contact between the sensitized paper and work being printed always perfect, whereby superior results are obtained over ordinary print-frames.

, A smaller gear 31 is secured upon the other end of pulley 18 and meshes with teeth 32 in the rim 32 of spider 12, so that the surfaces of roller 19 and the glass cylinder will travel at the same rate of speed.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A sensitized paper printing machine comprising a revoluble hollow glass cylinder; an artificial light within said cylinder a driving-roller and a guide-roller adjacent to said glass cylinder; an endless belt passing over said driving and guide rollers and bearing upon the surface of said cylinder throughout a part of the circumference thereof; and positive means to cause the travel of the surfaces of the driving-roller and cylinder at the same rate of speed.

2. A sensitized paper printing machine comprising two hollow shafts mounted in a frame; artificial lights secured to said hollow shafts; revoluble spiders mounted on said shafts; angle-blocks secured to said spiders; a hollow glass cylinder secured to said spiders by said blocks; Va driving-roller and a guide- IOC roller mounted in said frame adjacent to and exterior to said glass cylinder 5 an endless traveling belt passing over said rollers and bearing upon a portion of the exterior surface of said glass cylinder; means to keep said traveling belt pressed against said glass cylinder; and means to cause the travel oi the surfaces of said belt and cylinder at the same rate of speed.

3. A sensitized -paper printing machine comprising two hollow shafts mounted in a frame; electric lights secured to said hollow shafts; revoluble spiders mounted on said shafts, one of said spiders being provided with teeth in its rim; angle-blocks secured to said spiders; a hollow glass cylinder secured to said spiders by said blocks; a drivingroller and a guide-roller mounted in said frame adjacent to and exterior to said glass cylinder; an endless traveling belt passing over said rollers and bearing upon a portion of the exterior surface of said glass cylinder; a tension-roller within said traveling belt to keep the same taut; a gear upon one end of said driving-roller, said gear meshing with the teeth on the rim of the spider; a gear on the other end of said driving-roller; a driving-shaft mounted in said frame; a Worm secured upon said shaft and meshing with thc gear on the driving-roller and means to drive said shaft at different rates of speed.

In witness that I claim the foregoing l have hereunto subscrib ed my name this 28th day of September, 1905.

LEONARD M. RASH. l/Vitnesses:

G. E. HARPHAM, HENRY T. HAZARD.

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