Browse Prior Art Database

High Speed Printer

IP.com Disclosure Number: IPCOM000087511D
Original Publication Date: 1977-Feb-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Pawletto, JP: AUTHOR [+4]

Abstract

A high speed printer comprises plural print heads 10 and 11 independently and asynchronously movable along a stationary bar 12. The stationary bar 12 is a toothed motor bar of a linear stepper motor. The print heads comprise a motor element which coacts with the motor bar 12 for stepwise movement in either direction along bar 12. A specific motor structure for the motor bar 12 and the motor element of the print heads is shown in U. S. Patent 3,867,676. The print heads include a print mechanism mounted on the motor element of any known type which records symbols or patterns on a print medium such as paper 13, which is supported and advanced by platen 14 in any well-known manner. A print mechanism may take any form, such as a rotating disk, a wire matrix print head or an ink jet print head.

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High Speed Printer

A high speed printer comprises plural print heads 10 and 11 independently and asynchronously movable along a stationary bar 12. The stationary bar 12 is a toothed motor bar of a linear stepper motor. The print heads comprise a motor element which coacts with the motor bar 12 for stepwise movement in either direction along bar 12. A specific motor structure for the motor bar 12 and the motor element of the print heads is shown in U. S. Patent 3,867,676. The print heads include a print mechanism mounted on the motor element of any known type which records symbols or patterns on a print medium such as paper 13, which is supported and advanced by platen 14 in any well-known manner. A print mechanism may take any form, such as a rotating disk, a wire matrix print head or an ink jet print head.

Attached to the print heads 10 and 11 are transducers 15 and 16, which sense code marks 17 on a location bar 18. Each code mark 17 represents an address position along the motor bar 12. The code marks 17 are uniformly spaced at a distance which represents an increment of the length of the print head. The transducers read the code marks 17 and electronically store the addresses represented by the mark. Thus, increments of length along the bar 12 are associated with an address. Moreover, the addresses are uniquely related to the geometry of the stator bar and print head.

Fig. 2 shows a logic system for purposes of regulating the controls of the motor element of...