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Browse Prior Art Database

Keybutton Image Projection Machine

IP.com Disclosure Number: IPCOM000052421D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 3 page(s) / 34K

Publishing Venue

IBM

Related People

Mitchell, RW: AUTHOR

Abstract

United Kingdom Patent Specification No. 1,521,435 discloses a process for forming characters on keybuttons. The surface of each button is initially coated with a layer of radiation-sensitive material and then exposed to radiation which includes an image of the character to be formed on the surface of the button. A latent image of the character is thereby formed in the radiation-sensitive material which is subsequently developed so as to provide a visible reproduction of the character on the surface of the keybutton. The surface of the button is subsequently coated with a layer of a protective transparent material.

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Keybutton Image Projection Machine

United Kingdom Patent Specification No. 1,521,435 discloses a process for forming characters on keybuttons. The surface of each button is initially coated with a layer of radiation-sensitive material and then exposed to radiation which includes an image of the character to be formed on the surface of the button. A latent image of the character is thereby formed in the radiation-sensitive material which is subsequently developed so as to provide a visible reproduction of the character on the surface of the keybutton. The surface of the button is subsequently coated with a layer of a protective transparent material.

This article describes a machine for performing the above process. The machine is illustrated in the figure and comprises a base 1 on which is mounted a projection head 2 adapted to hold a library of slides 3. Also located on the base 1 is a table 4 mounted on sliders 5 and 6 for movement in two perpendicular directions (X and Y) relative to the base 1 and in the plane of table 4. Extending from table 4 is an arm 7 terminating in a pointer 8. Adjacent to base 1 is located a support 11 for a template 12.

The table 4 is adapted to support a set of keybuttons 13 for a keyboard. The library 3 holds a set of slides including the set of characters to be formed on the surfaces of the keybuttons on the table 4. The template 12 is formed with the relative positions of all the keybuttons 13 on the table 4.

The keybuttons to be formed with characters are initially coated with a layer of radiation-sensitive material and are mounted on the table 4 in their correct relative position. The correct slides are mounted in the library 3 in the order of the keybuttons on the table. In order to initiate the character-forming process, the pointer 8 is moved until it is located over the position on the template 12 corresponding to the first keybutton, and this ensures that the first key-button is located accurately beneath the projection head 2....