US2213644A

US2213644A - Method of coating a transfer device

Info

Publication number: US2213644A
Application number: US179436A
Authority: US
Inventors: Louis C Antrim
Original assignee: AUTOGRAPHIC REGISTER CO
Current assignee: AUTOGRAPHIC REGISTER Co
Priority date: 1937-12-13
Filing date: 1937-12-13
Publication date: 1940-09-03
Anticipated expiration: 1957-09-03

Description

Sept. 1940- 1.. c, ANTRIM I 2,213,644

METHOD OF COATING A TRANSFER DEF VICE Filed D60. 13, 1937 UNSIZED & UNCALENDERED PAPER COATED WITH OILSOLUBLE INK CONTAINING INSOLUEaLE POWDER IMPREGNATED WITH OIL SOLUBLE INK INSOLUBLE POWDER DEPOSIT 0N SURFACES OF PAPER 01L SOLUBLE INK CONTAINING INSOLUBLE POWDER INVENTOR ATTORNE locals fi-Ahtrim,

Patented Sept. 3, 1940 UNITED-STATES .METHOD OF COATING A TRANSFER DEVICE .Louis C. Antrim, New York, N. Y., assignor to Autographic Register Company, Hoboken, N. .L, a corporation of New Jersey Application December 13, 1937, Serial No. 179,436

6 Claims.

quantity of ink'so that the device will last over a considerable period of time. However, it has been found that such transfer paper will produce undesirable smudges and will bleed or lose the ink quite rapidly when in use. To overcome this difllculty, applicant has devised a new transfer sheet and a new method for producing the same. so According to the present invention, a porous sheet is impregnated with an oil-soluble ink and is provided with a layer or coating in intimate contact with the sheet providing a porous cover for the sheet which will effectively con- 95 trol the amount of ink permitted to leave the paper when an impression is made from the paper, and which will prevent smudges due to ex'- cessive ink on the surfaces of the paper. Y

The layer or porous cover is composed of finely 80 divided material which is insoluble in the ink solution and which is also incapable of chemical reaction with the constituents of the ink. This material adheres firmly to the paper and is retained thereby for subtsantially the life of the 85 paper.

The invention also provides a novel method of producing the paper whereby the paper is simultaneous'ly impregnated with the inksolution and coated with the finely divided ink-retarding ma-.

40 terial. This enables the production of the paper to be efiected very rapidly.

According to the method of the present invention, the finely divided material is held in suspension in the ink solution and, as the ink is absorbed in the paper, the finely divided material will be deposited on the surface thereof. It will be seen that the deposit will bein proportion to the amount of ink absorbed in the paper so that, when only a small amount'of ink is ab-- sorbed, only ,a thin coating is formedon the surface and, conversely, when a large amount of ink is absorbed, the deposit on the surface'will be thicker. The deposit or layer is slightly porous u so that it will control the flow of ink from the paper to another medium when impressions are made therefrom. If desired, one side of the paper can be rendered nontransferring by.providing it with an impervious coating of lacquer or the like, so that, i when used in a typewriter, the paper will only make one transfer impression.

Other features and advantages of the invention will be apparent from the specification when considered in connection with the drawing, in 10 which:

Figure 1 is a sheet of paper.

Fig. 2 shows a section of the sheets slightly impregnated with the ink and having a thin coating of insoluble powder on the surface.

Fig; 3 shows a section of the paper which is fully impregnated with oil-soluble ink and having a heavy deposit of insoluble powder on the surface.

Fig. 4 shows a section of the paper which has been fully impregnated and coated with the finely divided material and having a backing coat of lacquer thereon.

Fig. 5 shows a view of the paper-inking machine.

According to the invention, a paper It! is used as the base material. The paper is unsized'and uncalendered so that it is very porous. It must be understood, however, that any type of porous material may be used, according to this invention. The paper is usually wound into a roll II which is mounted on a spindle [2 at the receiving end of an inking machine I3. A mixture of oil and pigment or dye I4 is mixed andplaced in the trough IS. A suitable quantity of finely divided or powdered material, which will not chemically react with the ink solution and which is insoluble in the ink solution, is next mixed with the ink solution in the trough l5 so as to be suspended in the inking solution. The solution and powdered material may be completely mixed before being placed in the trough ii if desired.

The finely divided material or powder may be a metal such as aluminum or bronze, a metal alloy, a metal oxide such as iron oxide, soap stone,

or the like. For example, iron oxide makes a very effective coating material for black trans fer paper.

The paper from the roll II is passed over a guide roller l6 and into the solution in the trough. A guide roller i1 is mounted so as to bepositioned in the trough to hold the material submerged in the mixture. As the paper passes through the mixture, it will absorb the ink and 55 on the surface, as shown at 22 in Figs. 2 and 3.

Fig. 2 diagrammatically shows the paper in the condition when the ink solution first contacts it and places alight deposit of the powdered material on the surface. Fig 3 diagrammatically shows the sheet-when fully impregnated with the ink and coated with the insoluble powder deposit.

As is indicaEed by these two figures, the amount of powdered material deposited on the surface is in proportion to the amount of ink absorbed by the paper. When a small amount of ink is absorbed by the paper, the light coating of powdered material which is deposited will be sufficient to prevent the paper from smudging or bleeding. However, when a larger amount of ink is absorbed by the paper, to thoroughly saturate the same, the danger of smudging is much greater and a larger amount of coating on the surface is necessary to prevent the smudging or excessive bleeding of the ink. This will be present because the increased absorption of the ink into the paper will be operative to deposit by filtration larger quantities of coating material on the paper, and this will be suflicient to prevent the ink from passing from the paper too freely when used. The amount of ink absorption and coating can be controlled by the speed at which the paper is carried through the solution.

The paper, upon leaving the solution, is passed around a guide roll [8, through a pair of squeezing rollers l9, between a pair of spring-pressed feed rollers 20 and through a pair of felt-covered rollers 2|. The paper in leaving the tank has the excess ink squeezed therefrom by the rollers l9, which also function to press the powdered material into more intimate contact with the paper. The layer of finely divided material, when in intimate contact with the paper, will adhere thereto for the life of the paper without the use of adhesives or other bonding means.

Should there be any unevenness in the coating or any surplus ink solution on the surface of the strip, it will be absorbed and evenly deposited by the felt rollers 2|. a winding means or other take-up device (not shown) where it is allowed to dry.

This process produces a transfer. sheet provided with two transfer sides, each capable of giving an impression. If desired, one surface of the impregnated strip can be rendered nontransferring. This may be done in various ways. For example, a backing material or lacquer 23 can be applied directly to the paper if the backing material or the lacquer is impervious to the ink sopaper.

lution. If the material is not completely impervious to the ink solution or will not properly adhere tos' the paper, a bonding or filler coat can be first applied to the paper and then the lacquer applied to complete the seal of the back of the This prevents offset impressions when the paper is used in a typewriter or the like.

Variations and modifications may be made within the scope of.this invention and portions of the improvements used without others.

I claim:

1. The method of making a transfer device for repeated manifolding use, of the kind in cluding an absorbent paper impregnated with an inking solution, which consists in mixing with theinking solution a quantity of powder of the class including powdered metal, powdered alloy, and powdered metal oxide to cause suspension of said powder in said solution; immersing the The strip is then led to absorbent paper in the mixture of inking solution and powder to cause simultaneous absorption of the inking solution by the paper and precipitation of the powder from the inking solution onto the surface, of the paper to form a coating thereon comprised solely of a layer of said powder still pulverous except as wetted by said solution; prolonging the time of such immersion until the desired thickness of wetted pulverous coating is obtained on said surface; and removing the paper from such immersion when the desired thickness of coating is obtained on said surface. I

2. The method of making a transfer device for repeated manifolding use, of the kind including an absorbent paper impregnated with an inking solution, which consists in mixing with the inking solution a quantity of metallic powder to cause suspension of said powder in said solution; immersing the absorbent paper in the mixture of inking solution and metallic powder to cause simultaneous absorption of the inking solution by the paper and precipitation of the powder from the inking solution onto the surface of a paper to form a coating thereon comprised solely of a layer of said powder still pulverous except as wetted by said solution; prolonging the time of such immersion until the desired thickness of wetted pulverous coating is obtained on said surface; and removing the paper from such immersion when the desired thickness of coating is obtained on said surface.

3. In the method of making a transfer device for repeated manifolding use, which device comprises a sheet of absorbent paper impregnated with an inking solution and covered at a transfer surface with a coating of metallic powder still pulverous except as wetted by said solution and acting to partially choke the pores of the paper and regulate the quantity of ink solution given off during a transfer operation, the step of insuring that said coating will correspond in degree of thickness to the degree of absorption of inking solution by the paper; said step consisting of adding said powder to and mixing the same with said inking solution and while said inking solution carries said added powder in sus pension therein bringing the paper into absorptive relation to said solution, thereby to insure that as impregnation of the paper with said solution proceeds the powder suspended in the soluing solution a quantity of powdered alloy to cause suspension of said powder in said solution; immersing the absorbent paper in the mixture of inking solution and powdered alloy to cause simultaneous absorption of the inking solution by the paper and precipitation of the powder from the inking solution onto the surface of the paper to form a coating thereon comprised solely of a layer of said powder still pulverous except as wetted by said solution; prolonging the time of such immersion until the desired thickness of wetted pulverous coating is obtained on said surface; and removing the paper from such immersion when the desired thickness of coating is obtained on said surface.

5. The method of making a transfer device for repeated maniiolding use, oi. the kind including/ an absorbent paper impregnated with an inking solution, which consists in mixing with the inking solution a quantity of powdered metal oxide to cause suspension or said powder in said solution; immersing the absorbent paper in the mixture of inking solution and powdered metal oxide to cause simultaneous absorption 0! the inking solution by the paper and precipitation of the powder from the inking solution onto the surface of the paper to form a coatingthereon comprised solely of a layer of said. powder still pulverous except as wetted by said solution; prolonging the time of such immersion until the desired thickness 01 wetted pulverous coating is obtained on said surface; and removing the paper from such immersion when the desired thickness 0! coating is obtained on said surface.

6. The method of making a transfer device for repeated manitolding use, of the kind including an absorbent paper impregnated with an inking solution, which consists in mixing with the inking solution a quantity of powdered iron oxide to cause suspension oi said powder in said solution; immersing the absorbent paper in the mixture of inking solution and powdered iron oxide to cause simultaneous absorption of the inking solution by the paper and precipitation oithe powder from the inkingsolution onto the surface"oi the paper to form a coating thereon comprised solely of a layer of said powder still pulverous except as wetted by said solution; prolonging. the time of such immersion until the desired thickness oi wetted pulverous coating is obtained on said surface; and removing the paper from such immersion when the desired thickness of coating is obtained on said surface.

LOUIS C. AN'I'RIM.