DE3636608A1 - Device for typewriters for rendering carbon inking ribbons illegible - Google Patents

Abstract

The invention proposes a device which, in the case of typewriters with carbon-inking-ribbon cassettes, renders the characters, which are "stored" on the inking ribbon, illegible again directly after they have been typed.

Description

introduction

On typewriters with carbon ribbon cartridges, all are after the writing process Letters and all data legible on the used part of the color bank the "stored" in the cassette.

According to the data protection law, every ribbon cassette used is therefore data to consider carriers. The data stored on it must be made illegible before giving it up out of hand.

There are complex devices with which it is possible to use the ribbons to make them illegible afterwards, but they are for small businesses and offices not suitable and probably too expensive.

2. Problem solving

The easiest way is to design the typewriters from the start ieren that the letter print on the tape as soon as possible after the Writing process is deleted again.

3. Patent application

This is the purpose of a "device for typewriters for illegibility carbon ribbons "for which I am applying for a patent.  

4. Description

4.1 Name

Device for typewriters to make carbon ribbons illegible.

4.2 State of the art

On typewriter typewriters, a metal stop lever flips that over the keyboard selected characters of the type wheel against carbon tape and paper. The characters are thereby embossed in the carbon ribbon, i. H. you are cannot be removed even by wiping.

4.3 The solution to the problem is to overprint the embossments in the ribbon to make them illegible with a special delete symbol.

4.4 Description of the device

An extinguishing arm offset to the side is attached just above the type wheel. This extinguishing arm bears a special deletion mark that coincides with the selected characters of the type wheel, but laterally offset, against the be written carbon tape beats.

4.4.1 This deletion mark can be similar to the print characters on the type wheel be attached to a spring arm.

4.4.2 The actuation is carried out by a separate stop mechanism or by a own stop lever, coupled with the stop lever for the type wheel.

4. 4. 3 Delete characters: As special "delete characters" z. B .: §, $,%, &, ¢, X, ≡, *, which must be enlarged in order to have a complete over print and make it illegible.

4. 4. 4 Material of the deletion mark: The deletion mark can expediently Metal can be made for better embossing and longer life to achieve, but deletions made of hard rubber or plastic are certainly flat if applicable.

4. 4. 5. The delete mark strikes the carbon strap against an abutment on the zei judge. This abutment consists of a hard rubber pad on one Metal pad.

The carbon coating on the ribbon is removed again, the plastic ribbon embossed again, the original impressions are made illegible (See drawing for details).

Claims (8)

1. Device for typewriters to make illegible carbon ribbons, characterized in that it makes the labeled and thus indelible ge embossed single-use ribbons of typewriters with carbon ribbon cartridges immediately after the writing process illegible. 2. Attach a resilient "extinguishing arm" on the side above the type wheel the side of the labeled ribbon. 3. On top of this spring arm sits a special deletion mark, similar to the print characters of the type wheel. 4. The deletion mark should preferably consist of metal. But are possible also plastic or hard rubber. 5. Examples are given for the deletion mark. It is essential that it is larger than the characters on the type wheel. 6. Abutment of the deletion mark on the typewriter's line judge: Base plate made of metal, overlay made of hard rubber, soft plastic, Rigid foam or the like 7. Actuate the extinguishing arm simultaneously with the stop of a type wheel with its own stop mechanism or with its own stop lever, coupled with the stop lever for the type wheel. 8. Possibility of collecting the carbon powder (e.g. small channel) at the bottom the metal plate of the abutment for the extinguishing arm.