Browse Prior Art Database

Rolling Contact Strip Printer

IP.com Disclosure Number: IPCOM000088283D
Original Publication Date: 1977-May-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Kambic, SF: AUTHOR

Abstract

Fig. 1 shows a printer that prints a single line of characters on a strip of paper 2. Character elements are located on the circumference of a disk 3 that is connected to be rotated by a stepping motor 4. The stepping motor is advanced by a controller 5 that supplies the appropriate number of pulses to increment the motor in either direction to a selected position from a previous position. A magnet 6 is mounted on the motor shaft 7 to close a switch 8 when the print wheel is in a reference position. To begin a printing operation, the print wheel is rotated until the reference position is reached. For succeeding character printing operations, the controller computes the number of pulses that are required to advance the print wheel.

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Rolling Contact Strip Printer

Fig. 1 shows a printer that prints a single line of characters on a strip of paper 2. Character elements are located on the circumference of a disk 3 that is connected to be rotated by a stepping motor 4. The stepping motor is advanced by a controller 5 that supplies the appropriate number of pulses to increment the motor in either direction to a selected position from a previous position. A magnet 6 is mounted on the motor shaft 7 to close a switch 8 when the print wheel is in a reference position. To begin a printing operation, the print wheel is rotated until the reference position is reached. For succeeding character printing operations, the controller computes the number of pulses that are required to advance the print wheel.

When the print wheel has been advanced to a selected position, a mechanism 10, shown in more detail in Fig. 2, is operated by a solenoid 11 to swing through an arc 12 that causes a surface 14 of mechanism 10 to raise the paper strip into pressure contact with the selected character on disk 3. Mechanism 10 includes a lever 15 that pivots on a stationary shaft 16 and an arm 18 that pivots on a shaft 17 that is mounted on lever 15. A pin 19 mounted on lever 15 rides in a slot 20 on arm 18 to permit the arm to rise from the position shown in the drawing for a print operation as the mechanism is pulled to the right and to fall clear of the paper strip and print wheel on the return swing of the mechanism. During...