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Publication numberUS837279 A
Publication typeGrant
Publication dateDec 4, 1906
Filing dateFeb 3, 1906
Priority dateFeb 3, 1906
Publication numberUS 837279 A, US 837279A, US-A-837279, US837279 A, US837279A
InventorsCharles K Bradford
Original AssigneeCharles W Bradford, George W Bradford, Charles K Bradford
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Platen for type-writers.
US 837279 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

PATENTED DEC. 4, 1.906

Cv K. BRADFORD. PLATEN FOR TYPE WRITER.

APPLICATION FILED FEB. 3, 1906.

WITNESSES GHARLE K.

G? ONEFGURTH rrrrnnr cr mes.

BRADFORD, F l.-YNNF1ELD, MASSACHUSETTS, ASSIGNOR TO' {ii-iARLES Vi BRADFORD AND ONE-FOURTH TO iliADiOid); BOEBTON, MASSACHUSETTS.

Specification of Letters Patent.

Application filed February 3. 1906- Serial No. 299,341.

- by the impact of the printing characters of a type-writer against the paper supported by the platen.

The invention consists in a type-writer platen having a face composed of resilient hard-surfaced wear-resisting sections, prcferably of thin tempered sheet metal, such as steel, and a yleldingnoise-muffiing backing for said sections supported by the body of the platen,- the said sections being independent ofeach other to such an extent that the vibrations of each section will be absorbed by the yielding backing.

Of the accompanying drawings, forming a art of this s ecifi'cation Fi ure 1 re resents a perspective view of a type-writer platen embodying my invention. Fig. 2 represents a transverse section of the same. resents a longitudinal section.

The same numerals of reference indicate the same parts in all of the figures.

In carrying out my invention I provide a type-writer platen having a rigid body por- Ton, which may be of any suitable construction, the same being here shown as composed of a rigid metallic tube 12 and an enlargement 13, the said tube or enlargement being preferably formed by paper wound in a compact roll upon the tube 12. i do not limit myself, however, to this construction and may construct the rigid body of the platen in any other suitable way.

' the actin face of the platen, said face being 1 14 represents a noise -mufiiing member, which is formed as a cover for the rigid body and may be composed of any suitable yielding material, such as soft rubber, felt, or the usual composition of glue, glycerin, and molasses used for printers rolls. The mem ber 14 constitutes a support or backing for compose of strips or sections 15 15, of hardsuri'aced resilient material, preferablysheetsteel. The sections 15 are placed in close Fig. 3 repproximity to each other, edge to edge, and are secured at their end portions to the platen in any suitable way, preferably by being attached by rivets 16 or otherwise to rigid outwardly-projecting end flanges 17, ahixed to the rigid body of the platen. The sections 15 are of uniform width and are so arranged that the printing characters of the type-writer will strike each section when it is brought into operative position about midway between its edges. I consider it preferable to slightly separate the adjacent edges of the sections, so that they will not be in actual contact with each other.

A platen constructed as above described does not possess the resonant qualities of the ordinary platen, so that the noise caused by the impact of the printing characters against the paper supported by the platen is very muchreduced. Hence the objectionable noise attending the operation of type-writers with ordinary platens is obviated.

I do not limit myself to the details of construction above described, as the construction may be variously modified Without departing from the spirit of my invention.

1. A type-writer platen having a face composed of resilient, hard-surfaced, wear-resisting sections with their edges in close roximity, and a yielding, noise-mufiling acking for said sections.

2. A type-writer platen comprising a sectional face of resilient, hard-surfaced, wearresisting material, the sections having their edges in close proximity, a rigid'body ortion, and a yielding, noise-mufiling bac ring interposed between the body and the sectional face.

.3. A type-writer platen comprising a rigid body having outwardly-pro'ecting flanges at its end portions, resilient s est-metal strips attached at their ends to said flanges, said stri s having their edges in close proximity, an a yielding, noise-mufiiing backing interposed between the body and the said strips.

In testimony whereof I have affixed my signature in presence of two witnesses.

CHARLES K. BRADFORD. Witnesses: w C. F. BROWN,

E. BATOHELDER.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2618372 *Feb 15, 1949Nov 18, 1952Goetz Carlos CPlaten for typewriters
US4722621 *Oct 30, 1985Feb 2, 1988Johnson Reynold BKeyboard assembly and recording apparatus
EP0073841A1 *Aug 26, 1981Mar 16, 1983Ibm Deutschland GmbhPressure abutment for high-speed printers, especially for belt-type printers
EP0073841B1 *Aug 26, 1981Feb 26, 1986Ibm Deutschland GmbhPressure abutment for high-speed printers, especially for belt-type printers
Classifications
Cooperative ClassificationB41J11/053