US1579439A - Duplicator - Google Patents

Description

' A ril 6,1926. v I E.- M, DAUS arm.

DUPLICATOR 3 Sheets-Sheet 1 Filed Dec. 26, 1924 E is TORS

TTTTTT EY April 6 1926.

E. M. DAUS ET AL DUPLICATOR Filed Dec.

INVENTOR ATTOR N EY I an 26 3 Sheets-S EJ116291 Mpazw Lflfllldld Wilda;

d l/l WITNESS:

L A s u A D M E 6 2 9 1 6 u r P A DUPLICATOR Filed Dec. 26, 1924 3 Sheets-Sheet 5 v arr INVENTORS ATTOR N EY S M 6. m S m E Leonard HD4165 %TNESS: a

Patented Apr. 6, 1926.

UNITED STATES PATENT OFFICE.

nxmnsr u. Imus up LEONARD w. DAUS, or NEW "1031:, N. Y.

DUPLICATOR.

Application filed December as, 1924. SeriaI 1%. 758,244.

To all whom it may concern:

Be it known that we, ERNEST M. DAUS and LEONARD W. DAUS, citizens of the United States of America, residing at New York city, in the county of New York and State of New York, have invented new and useful Improvements in Duplicators, of which the following is a specification.

This invention relates to improvements in duplicators and has for its primary object the provision of a machine wherein use is made of a gelatine strip upon which is contained the matter to be duplicated, such as letters or the like, such strips having been used for this purpose before, but necessitated the sheet being placed flat over the strip and pressure applied to the sheet by passing the hand back and forth over the same until sufiicient pressure had been aplied, after which the sheet was separate rom the strip. This process is both slow and tiresome and it is our invention to overcome these objections by providing a' machine wherein the sheets to be rinted upon -are inserted and pressure applied evenly to the sheet against the strip automatically upon the operation of the machine.

Another object of the invention, resides in a duplicating machine which includes a rotatable drum upon which the gelatine strip is supported and upon which strip a plurality of different sets of indicia may be inscribed for reproduction, and means for selectively bringing any of the indicia into position for duplication upon inserted in the machine.

A further object of the invention is to pro vide a duplicator having a removable drum for expediting the changing of the gelatine strip when it is desired to insert a. new be duplicated.

strip having other indicia to With these and other objects in view, invention resides in certain novel construction and combination and arrangement 0 parts, the essential features of which are hereinafter fully described, are particularly ointed out in the appended claims, and are illustrated in the accompanying drawings, in which Figure 1 is a side elevation of our invention. r

Figure 2 is a front elevation of the same.

Figure 3 is a top plan view.

. Figure 4 is a vertical longitudinal seca sheet to be the t'ional view on the line 4-4 of Figure 3.

Figure 5'is a transverse sectional view on the line 55 of Figure 1.

Fi ure 6 is an enlarged horizontal sectiona view on the line 66 of Figure 1.

7 Referring more particularly to the drawings, the reference numeral 10 designates a base and from which ri s s apair of spaced aligned brackets 11 whic serve as a support for a rotatable drum 12. The tops of the brackets are formed with removable bearings 13 for the reception of the stub shafts 14 whereby the drum may be quickly removed for a purpose to be presently described.

The outer periphery of the drum 12 is not continuous but is cut-away to provide a pair of spaced ends, which leaves an interval in the rotation of the drum when the (1 same is-out of engagement with the pressure means 16 which will be fully described hereinafter. Spaced spiders 17 are arranged within the drum, and the opposed portions of which are notched as at 18 and 1.9 for respectively receiving the spindles of a spool 20 containing a gelatine str p 21 and a winding spool 22 upon which the strip is wound after passing about the outer periphery of the drum. For the sake of clearness, it is here stated that the strip 21 is formed of a gelatine substance upon which the matter to be duplicated is ap lied. This matter is placed upon the strip by first preparing the original sheet, such as by typewriting and using a special ink, then placing the sheet with the'printed slde in contact with the outer surface of the gelatine strip and applying pressure thereto, after which the orlginal sheet is removed leaving an imprint upon the gelatine strip. This machine is primarily intended for duplicating typewritten letters or other documents and any number of different letters or documents f may be consecutiyely inscribed upona single strip depending upon the length of the strip and an. length of the letter to be duplicated. The use of a gelatine strip in this manner is broadly old in the art and a further explanation of the same is not deemed necessary. To prevent the gelatine strip from adhering to the drum, We provide a layer of waterproof material 23 between the drum and the strip in order to facilitate the easy movement of the strip when unwinding same from one spool to the other. Ratchet wheels 24 and 25 are mounted upon the spindles of the respective spools 20 and 22, and pawls 26 and 27 respectively co-act with the ratchet wheels to prevent retrograde movement of the spools when winding the strip about the winding spool 22. The tension of the strip about the drum serves to hold the spindles of the spools seated in their respec tive notches and when it is desired to remove the spools or rolls, the tension is relieved by paying out the strip from the spool 20. A winding or manipulating knob 28 is provided at one side of the drum for rotating the winding spool 22, and a similar knob 29 is carried by the spool 20' for use in lifting the spool from the drum when replacing the gelatine strip.

The pressure means '16 above mentioned comprises a platform 30 which is pivotally mounted upon the base at 31, one end of which serves as a bearing for a removable pressure roller 32 which co-acts with the drum when the same is rotated- Pressure is applied to the gelatine strip by reason of the springs 33 which tend to pull downward upon the front end of the platform, thereby swinging the rear end upward. A metallic plate 34 is mounted on the top face of the platform and a portion of the same extends slightly about the roller 32 for guiding the sheets over the roller upon their insertion. A guide rail 35 is mounted upon the platform and when inserting the sheets, the sides of the same are moved against the roller so that the sheets enter the machine in perfect relation with respect to the drum. The guide rail is mounted for lateral adjustment upon the platform as at 36, and a slide 37 is adjustably mounted upon the guide rail for holding the sheets to be printed upon in stack formation.

In operation, a sheet is inserted by sliding the same over the platform toward the roller 32, and the drum is rotated whereupon the sheet is picked up by the drum, it being understood that the pressure roller 32 is disposed in the path of movement of the drum, and as the gelatine strip engages the roller 32, the same is forced downward against the tension'of the springs 33 thereby applying added pressure between the sheet and the gelatine strip. When the drum has been given a complete revolution by means of the handle 38, the sheet is ready to be removed from the gelatine strip with the matter on the strip duplicated upon the sheet, it being understood that the sheet adheres to the strip as the drum is rotated.

To prevent retrograde movement of the drum, we provide the same with a ratchet 39 for co-actiou with a dog 40 mounted on the inside of one of the brackets 11. A counting machine 41 is mounted on the other bracket 11 and is operable by a trip 42 carneath said ried by the drum, upon each revolution of the same whereby the number of sheets passing through the machine may be recorded.

In the several figures of the drawing, the roller 32 is held out of the path of movement of the drum by a pivoted member 43 having an outwardly extending manipulating arm 44, the said member co-acting with a wear plate 45 carried by the underside of the plate 34. When the member is in engagement with the wear plate, the platform is held against the tension of the springs at which time the device is inoperative due to the roller 32 being out of the path of movement of the drum. When the member is lowered the springs 33 automatically move the roller 32 into co-acting position withthe drum. By this arrangement the roller is held from contact with the gelatine strip when the device is not in use.

While we have described what we deem to be the most desirable embodiment of our invention, it is obvious that many of the details may be varied without in anyway departing from the spirit of our invention, and we therefore do not limit ourselves to the exact details of construction herein set forth nor to anything less than the whole of our invention limited only by the appended claims.

What is claimed as new is 1. A machine of the class described including a rotatable drum having indicia to be duplicated thereon, and pressure means for co-action with said drum at an interval during each revolution of the same, said means comprising a pivoted platform constituting the sheet feeding table, a roller supported at one end thereof, and springs at the other end for normally holding said roller in the path of movement of said drum.

2. A machine of the class described including a split drum, a strip of material adapted to have indicia to be duplicated thereon, means for adjustably securing said strip about the periphery of said drum, a platform constituting the sheet feeding table over which a sheet to be printed upon is passed, a pressure roller supported by said platform in the path of movement of said drum, and means for holding said roller out of the path of movement of said drum.

3. A machine of the class described comprising a base, a rotatable drum removably mounted above said base, a strip adapted to have indicia thereon to be duplicated, means for adjusting said strip about the periphery of said drum, a platform constituting the sheet feedin table pivotally mounted berum, a roller carried by said platform in the path of movement of said drum, and means for exerting pressure between said roller and said drum upon each revolution of the same.

4. A machine of the class described com- F prising a base, a rotatable drum removably mounted above said base, a strip having indicia thereon to be duplicated, means. for adjusting said strip about the periphery of said drum, a platform pivotally mounted beneath said drum and constituting the sheet feeding table, a roller carried by said platform in the path of movement of said drum, and means for exerting pressure between said roller and said drum upon each revolu tion of the same, said last means comprising contractile springs between the forward end of said platform and said base.

5; A machine of the class described comprising a base, a rotatable drum removably mounted above said base, a strip having indicia thereon to be duplicated, means for adjusting said strip about the periphery of said drum, a platform pivotally mounted beneath said drum and constituting the sheet feeding table, a roller carried by said platform in the path of movement of said drum, and means for exerting pressure between said roller and said drum upon each revolution of the same, said last means comprising contractile springs between the forward end of said platform and said base, and coacting means between said platform and said base for holding said roller out of the path of movement of said drum.

In testimony whereof We signatures.

ERNEST M. DAUS. LEONARD W. DAUS.

have affixed our

Images