Browse Prior Art Database

Customer Programmable Graphics for an All Points Addressable Printer

IP.com Disclosure Number: IPCOM000052584D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 5 page(s) / 78K

Publishing Venue

IBM

Related People

Flurry, GA: AUTHOR [+5]

Abstract

Disclosed in this article is apparatus by which an all-points-addressab printer may be controlled by the user so that he may design and/or type his own special characters or graphics, including letterheads, etc. It is assumed that the printer is interactive and that the matrix printhead 18 includes a scanner or the like mounted on the carrier for movement across print media 1 mounted on a platen 12. With the apparatus described hereinafter, the user is given freedom to generate his own set of custom graphics.

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Customer Programmable Graphics for an All Points Addressable Printer

Disclosed in this article is apparatus by which an all-points-addressab printer may be controlled by the user so that he may design and/or type his own special characters or graphics, including letterheads, etc. It is assumed that the printer is interactive and that the matrix printhead 18 includes a scanner or the like mounted on the carrier for movement across print media 1 mounted on a platen
12. With the apparatus described hereinafter, the user is given freedom to generate his own set of custom graphics.

In a conventional impact typewriter, each character is printed when a type face with a desired character embossed on the surface thereof is pressed against a ribbon onto the paper, leaving ink in the shape of the embossed area. Conventionally, the characters that may be printed are fixed in number and kind even when the type elements that are used on the typewriter are changeable. Moreover, special characters are limited to a size approximately equal to one character space. In order to obtain special characters, users must request that a special engineering design of the desired character be built into a special element. This process is expensive and time consuming. Described below is a means by which the customer can easily design his own characters and program those characters into a matrix printing interactive printer, for example, an electronic typewriter without the need for external help or special equipment.

The apparatus for accomplishing the same is illustrated best in the drawing. A preprinted form 1 contains a reference bar A and a grid B. Each grid element C corresponds to its particular spot in the character box or character matrix of the matrix printhead. Inasmuch as the interactive printer to which the subject matter may be applied may also be used to draw forms or the like, the form or grid structure itself may be printed by the printer when required.

The scanner 2 in the drawing is capable of detecting black and white areas on the preprinted form 1, and sending appropriate signals to the signal processing and control electronics (SPCE) 3. The carrier 4 moves laterally across the print media or preprinted form 1 as is conventional except that the carrier drive 5 is capable of moving the carrier at a steady velocity across the paper as well as moving incrementally when, for example, the printer is in the interactive mode for typing, for example, individual characters. As illustrated, the carrier drive comprises a drive motor 6, a lead screw 7, and an anti-backlash nut 8, an emitter wheel and sensor 9, signal processing electronics 10 and motor drive control electronics 11. The emitter wheel and sensor 9 provide signals which are used to control the drive motor and to provide information on changes in the horizontal position of the carrier 4 to the SPCE 3.

The typewriter platen 12 is driven by the index drive mechanism 13 which includes a secon...