US1891366A

US1891366A - Platen roller

Info

Publication number: US1891366A
Application number: US436017A
Authority: US
Inventors: Mihran H Alexanian
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-03-15
Filing date: 1930-03-15
Publication date: 1932-12-20
Anticipated expiration: 1949-12-20

Description

Dec. 20, 1932.

M. H. ALEXANIAN PLATEN ROLLER Filed March 15. 1330 Wmmmw 3 R I BYZ ATTORNEY Patented Dec. 20, 1932 UNITED STATES HIHBAN H. ALEXANIAN, OF COYTESV'ILLE, NEW JERSEY PLATEN ROLLER Application filed latch 15, 1930. Serial No. 436,017.

same.

In the customary form of platen roller made of a rubber compound when new, it embosses the paper and after aperiod of time hardens. After theplaten hardens it no longer presents a surface which permits of the proper type impression and therefore must be discarded. Both the rubber platen and various substitutes therefor furnish, when the keys strike the paper, the greatest element of noise in the operation of a typewriter.-

Amongst the objects of my invention are to provide a platen roller for a typewriter which will have a longer life. reduce the noise incident to the keys striking the paper on the platen and one which will be lighter in construction and cheaper to manufacture.

Referring to the drawing:

Figure 1 is a, perspective view embodying the principles of my invention.

Figure 2 is a broken detail sectional view.

Figure 3 is a broken detail sectional view of a modified form of platen roller.

In carrying out my invention I propose to provide a platen 1 having an internal core 2 preferably made of paper pulp or cardboard. About core 2, I propose to wind bias strips of muslin or other fabric 3 spirally in layers, each spiral layer being wound in the opposite direction, the spiral strips having their sides abutting when wound to give a smooth surface; The use of bias strips permits of the fabric 3 conforming to core 2 without bulging and permits of the winding under pressure thereby obviating the necessity of a binder between the strips, the strips being under tension grip core 2, in strong frictional engagement. Fabric 3 is applied in layers to the desired thickness. The outermost layer 3' I preferably coat with shellac 4 although other forms of filler and binder might be used.

Although I have shown in my preferred embodiment a platen entirely built up of fabric where it is desired for increased resiliency, a layer of cork 5 can be inserted beneath the outermost layers of fabric 3 as shown in the modified form (Figure 3).

My invention adapts itself to the manufacture of platens in long cylinders and thereafter cutting the cylinders into the desired lengths for the particular make of the machine for which the platen has been Wound. Such a method of manufacture reduces cost as the winding may be done by machine. In the modified form (Figure 3) I'propose to insert adjacent the outermost layer 3 or layers, a layer of cork 5, which is secured between the fabric layers 3 by a binder of shellac, glue; or other binding material. Where a Very smooth and velvety surface is required I propose to mix with the shellac for the outer surface binder powdered cork 4 to fill the interstices of the outer layer fabric 3. This surfacing, how- I ever, is very thin and functions to fill in the fabric 3 and not as a coating.

It will thus be seen that I have provided a platen for typewriters which is light in weight, durable, permanent and which by reason of the inner bias fabric strips having no binder function as a sound deadener and furnish the required elasticity to permit of long usage without change or variation in form or contour.

What I claim is:

1. A'platen roller having a core, strips of bias fabric spirally wound about said core, a cork layer about said fabric strips, additional layers of fabric about said cork, a filler for said outermost fabric layers, the outermost fabric layer impregnated with a binding material to bind same to the underneath layer.

2. A platen roller, strips of fabric wound spirally in layers, one layer upon the other to form a platen, the outer layer of the fab ric having its interstices filled with a filler of minute solid particles and an adhesive to furnish a smooth surface and to prevent unwinding of the fabric.

3. A platen roller relatively narrow strips of bias fabric wound spirally, one layer upon the other, each of said layers wound in the opposite direction, a cork layer about said fabric layers, an additional outer layer of fabric, said outer layer having the interstices of the fabric filled with minute solid particles and an adhesive.

Signed at New York, in the county of New York and State of New York, this 10th day of March, A. D. 1930.

MIHRAN H. ALEXANIAN.