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Browse Prior Art Database

Ribbon Stuffing Box

IP.com Disclosure Number: IPCOM000049276D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Bihn, FA: AUTHOR [+5]

Abstract

An improved ribbon stuffing box for allowing the use of an endless ribbon in a wire matrix printer is described with reference to the figures.

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Ribbon Stuffing Box

An improved ribbon stuffing box for allowing the use of an endless ribbon in a wire matrix printer is described with reference to the figures.

Most printers that utilize stuffer boxes have relatively short exposed length and narrow width ribbons. Thus, tracking is not difficult. However, where it is desirable to distribute the wire in a set area over a greater ribbon width, the wide ribbon may become offset at an angle. This causes tracking problems because the ribbon acts like a tall slender post which buckles over in portions of the print path, leading to paper smudging, tearing of the ribbon by the wires, and generally poor ribbon tracking.

In the ribbon box 8, shown in Fig. 1, the feed rollers are meshing gears 10, instead of smooth wheels, pulling the ribbon 12. These gears 10 cause the ribbon 12 to exit the drive end 14 in a corrugated configuration. This corrugation effectively makes the ribbon 12 stiffer across its width.

After the ribbon 12 has been used for about one hour, the actuator hammer path 16, shown in Fig. 2, will decrease in length, causing the outer edges 18 of the ribbon to increase. This allows the guide post 20 to see only the very small actuator path 16 part of the ribbon 12. This allows better control on ribbon tracking, interrupts the flow of ink into actuator wire bushing of the print head, and causes less damage to actuator function.

Another unique feature of this ribbon stuffer box is that the guide posts 20 are an integral molded part of the stuffer box. Traditionally ribbon posts have been a problem because th...