DE1207409B - Multiplication sheet, tape or the like and method for its production - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

Number:
File number:
Registration date:
Display day:

B41n

German class: 151-4 / 01

1207409
C29275VIb / 151
March 1, 1963
December 23, 1965

The invention relates to new pressure sensitive duplicating sheets and tapes and the process for their manufacture.

It is known to manufacture pressure-sensitive duplicating tapes by impregnating a suitable woven or a strip of nonwoven fabric with a pressure sensitive dye composition. Such tapes are the most common types of ribbons currently used in typewriters, although they have a number of drawbacks exhibit. Probably their biggest drawback is the fact that such ligaments are through and through are porous and therefore transfer the transferable ink to the typewriter types while typing. This transfer increasingly worsens the sharpness of the individual characters on the type levers, as the ink dries on it, so that frequent cleaning is necessary.

Another disadvantage of such fabric tapes is that the prints obtained from them are not are colored evenly and the ao Pattern of the fabric tape used is evident. This effect is most evident when typing with a woven ribbon most clearly visible, although similar to nonwoven, dispersed fiber ribbons Give results.

In an attempt to solve these problems, ribbons and sheets were applied by applying a Pressure transferable color mass on a coherent film carrier, ζ. Β. from regenerated cellulose, Cellulose acetate or polyethylene terephthalate polyester. This resulted in a transfer of the Avoided ink on the typewriter types, and the fabric stood out in the prints obtained no longer stopped, however, there were some additional issues that could be encountered while using Ribbons of fabric did not come across.

These problems are due to the smooth, cohesive surface of the carrier film, which allows only poor adhesion of the applied paint to this surface. Unless a tie coat is applied between the film base and the paint coat, the paint coat will tend to peel off the base film and transfer to the uncoated side of the tape as the tape is wound. Such tie layers, however, are relatively expensive and can also degrade the quality of the tape or sheet as they increase the thickness of the carrier which in turn reduces its ability to conform to the types of typewriters.
The object of the invention is therefore the production of duplication sheets, tape or the like
Process for its manufacture

Applicant:

Columbia Ribbon

and Carbon Manufacturing Co., Inc.,

Glen Cove, Long Island, N.Y. (V. St. A.)

Representative:

Dipl.-Ing. E. Prince, Dr. rer. nat. G. Hauser
and Dipl.-Ing. G. Leiser, patent attorneys,
Munich-Pasing, Ernsbergerstr. 19th

Named as inventor:

Douglas Alexander Newman,

Glen Cove, Long Island, N.Y. (V. St. A.)

Duplication sheets or tapes or the like. B. of typewriter tapes, the backing of which is a transfer of paint to the types and that Prevents the tissue pattern from being imprinted on the imprints and still has an excellent affinity for has the color mass to be transferred.

The invention creates duplication sheets or tapes or the like. With plastic supports, of which the paint to be transferred does not peel off or on which it does not get cracks or cracks; with These new copying elements are uniformly clear and sharp under the action of pressure Brothers.

The invention can be better understood with the aid of the drawing. In the drawing shows

F i g. 1 is a schematic, enlarged cross-sectional view of a duplicating element according to the invention; and

F i g. 2 shows a schematic representation of a suitable device for carrying out the inventive method Procedure.

According to the invention, tapes and sheets on the basis of fibers are made of thermoplastic Resins that are either woven, intertwined, matted or otherwise combined into one Substance are bonded on only one surface for so long and heated to such a temperature that the Fibers melt together on the heated surface and form a cohesive

509 759/380

3 4

Form core paint impermeable surface film, while printing ink impermeable, fused surface the non-heated fibers on the other surface 11 and a color-absorbing or color-absorbing surface are not attacked and for printer-sorbing, unfused surface 12, the remain receptive to color. Which is either impregnated in this way with a customary paint compound fused carrier is then applied to the unheated, 5 or preferably a coating on wax or for printing ink receptive surface with resin base 15 carries, as is usual for carbon papers. Coated with a suitable color mass and gives a suitable usual liquid color mass for color then that in Fig. 1 of the drawing shown duplicating tapes can have the following composition aging element. point:

The process according to the invention can be reduced to _{parts by} weight

Turn of the in F ι g. 2 of the drawing illustrated _RR ,

Facility to be carried out. So z. B. a

usual, woven nylon tape (polyamide) passed from a roller 20 over a heated roller 21, the

Tricresyl phosphate 15

Nigrosine black 9

Diglycollaurate 15

Temperature equal to the melting point of nylon xs

(Polyamide) is or exceeds this, d. H. about 235 ° C. A suitable wax-based paint can be the

amounts to. Then the unheated side of the tape will have the following composition:

preferably via a chill roll 22 with a tem- _{component parts by} weight

temperature of about 30 to 50 ⁰ C led to the not carnauba wax 40

to quench fused fibers 20 _Ώ , _Λ , "' _ir .

and stop the merging process. The ßfenimvachs 10

Belt then runs under a tension roller 23, ^ enenwacns iu

and the non-merged side comes with a ■ n- ^mSiZ '? rA "n" j " W ·'! '«' · 'VIA ~ _n

-, j ,. 1 / ·>. · -Η -t. λ- pigment (carbon black or crystal violet) 20

Inking roller 24 in contact, the so in an e ν >

Trough 25 is arranged so that they are in the 25 wax-based paints of this type located therein

Liehe color mass is immersed and this during their usual heat melting methods on the invention

Rotation on the roller surface. After applied according to the treated fabric, the color

When the tape is colored, it runs on the scraper mass, heated to a flowable state, in a liquid state

26 over, which evenly distribute the color and form applied to the carrier and then cool

any excess paint is returned to the tub and allowed to solidify.

to lead. The colored tape then runs over a suitable resin-based paint

further tension roller 27 and ready for use will have the following composition:

wound on the roll 30. Components parts by weight

Although the above procedure in relation to the vinyl chloride-vinyl acetate copolymers

Manufacture of color ribbons has been described, 35 merisat 10 0

Of course, wide sheets of synthetic mineral oil 275 can also be used

tables, thermoplastic fabrics in the same way j ^ _u ß 7'5

treated and then later made into tapes or sheets of volatile solvents

be cut up. The color application can also be Ethvlacetat 45 0

device and methods used according to the 4c toluene 150

May be varied at will of those skilled in the art; the essential

Liehe feature of the invention is that only color compositions of this type are resin-based on the a surface of a uniform, thermoplastic treated according to the invention in a conventional manner see fabric carrier applied before application of a paint in the form of solutions, the verauf the unfused surface by heat 45 applied volatile solvent while remelting will. Allowing the replication layer to be evaporated.

In addition to the nylon (poly-

can be achieved that the fabric carrier via an amide), the invention can be applied to any substance, on

any heated surface leads, e.g. B. over the in any woven, braided, matted or on

F i g. 2 shown heated roller 21, over a hot 5 ° other way of fibers, threads, staple fibers or

Plate, via an infrared heating device or the like. Other sections made of synthetic, thermo-

The temperature of the heated surface depends on the plastic resin obtained substance application

the softening or melting point of each.

synthetic material representing the fabric carrier. B. hydrocarbon poly

and the fabric only needs as long with the heated 55 mers as polyethylene and polypropylene, vinyl poly-

Surface to stay in contact until the fibers, mere, ζ. B. polyvinylidene chloride threads and polyacrylic

Threads or staple fibers of the thermoplastic material nitrile fibers, polyester resins, z. B. Polyethylene Tere-

phthalate fibers, cellulose derivatives, z. B. Acetate Art

are melted and a cohesive one, for silk and cellulose nitrate, as well as many others. Not

Printing ink form an impermeable surface film, 60 non-thermoplastic natural materials are suitable, such as

while the fibers, threads or staple fibers on the cotton, silk and the like.

The unheated surface is essentially un- These fabrics can be woven in a known manner

stay changes. The heating time is generally ribbons or sheets processed or, e.g. B. in a

between just a few moments to about a papermaking machine, to an intertwined one

10 seconds, depending on the composition, the 65 or matted tape or sheet can be compressed.

Thickness and density of the fabric backing. The heat fusion of one surface of

F i g. 1 of the drawing shows the fused material from one of the above-mentioned thermoplastic

Document 10 with a coherent, for see substances existing materials takes place on the

same manner as described above with reference to nylon. The particular heating temperature depends on the melting point of the thermoplastic resin of which the fabric is made. For example, polyacrylonitrile melts at about 25O ⁰ C, Acetatkunstseide at about 180 ⁰ C and polyvinylidene chloride at about 175 ° C. The particular melting temperature of various thermoplastic threads, fibers, yarns and staple fibers will vary somewhat depending on the manufacturer and the manufacturing method; however, the temperature can easily be determined in each case by the person skilled in the art.

The cooling of the fabric carrier can usually take place after leaving the heated surface or can be assisted by acting on the unfused surface with a cooling surface lets, as shown in FIG. 2 is represented by roller 22. Optionally, this cooling surface, for. B. the roller 22, also oppose the heating roller 21 so that both surfaces of the cloth carrier ao be treated at the same time when it passes between the two roles.

Claims (5)

Patent claims: 1. Duplication sheet or tape or the like with an ink transfer layer on one side, characterized in that the support of the dye transfer layer is on one side heat fused to form a cohesive, non-color absorbing surface while the opposite surface is porous and ink-absorbing. 2. Duplication sheet, tape or the like. According to claim 1, characterized in that the Carrier is made of a flexible fabric made of a thermoplastic resin. 3. Duplication sheet, tape or the like. According to claim 2, characterized in that the Fabric is made up of fibers. 4. Duplication sheet, tape or the like. According to claim 2, characterized in that the Fabric made of polyamide fibers, nylon, polyethylene, polypropylene, polyvinylidene chloride threads, polyacrylonitrile fibers, Polyethylene terephthalate fibers, acetate rayon or cellulose nitrate is made. 5. A method for producing a duplication sheet, tape or the like according to the preceding Claims, characterized in that a carrier made of fibers of a thermoplastic, Resin-like material produces a surface of this carrier by the action of heat fuses to form a cohesive, non-porous surface film that is used for printing ink is impermeable, while at the same time the other surface to maintain its porosity cools, which is followed by the non-fused, porous, ink-absorbing surface of the fabric carrier applying a dye transfer compound. 1 sheet of drawings 509 759/380 12.65 © Bundesdruckerei Berlin