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Printer Configuration For Duplex Printing

IP.com Disclosure Number: IPCOM000052096D
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Lean, EG: AUTHOR [+2]

Abstract

Configurations are described in which printing is done with a single-band printer mechanism and two sets of hammers in order to double the printing throughput and/or in order to print on both sides of the paper simultaneously.

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Printer Configuration For Duplex Printing

Configurations are described in which printing is done with a single-band printer mechanism and two sets of hammers in order to double the printing throughput and/or in order to print on both sides of the paper simultaneously.

The basic printer configuration is shown in Fig. 1 (side view) and Fig. 2 (top view). There are two banks of print hammers 10,12 on each side of the print band drive 14. The paper 16 is guided between hammer bank 10 and ribbon 18 on one side and between hammer bank 12 and ribbon 20 on the other side. Adjacent ribbons 18,20 is the print band 22 and platens 24,26. The paper path from one side to the other passes through inside the print band loop, as shown. Hammer bank 10 will print one side of the paper, and hammers in bank 12 will print the other side. Both banks of hammers can be operated simultaneously.

For better efficiency, the paper path length from one print position to the other print position should be a multiple of paper length (for example, a 77 inch long paper path for 11-inch paper). The height of tractors 28 can be adjusted to compensate for various paper lengths.

The printer shown in Figs. 1 and 2 will produce duplex printing suitable for paper output with side binding. If the duplex printed output is to be bound at the top, a print band as shown in Fig. 3 should be used instead. This band has two rows of characters etched in the upside-down position. One row is for one side of the pri...