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Print Hammer Arrangement for Mini-Printing

IP.com Disclosure Number: IPCOM000034826D
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Lean, EG: AUTHOR [+3]

Abstract

It is desirable to have mini-printing in a high-speed line printer, but this is difficult to achieve without changing the print hammer packaging. Most high-speed printers available have hammers packaged at 0.1 in spacing for 10-pitch printing. In order to allow mini-printing at 12, 13.3 or 15 pitch, it has been the situation that a new hammer design was required in order to obtain pitches of more than 10 characters per inch. This problem is solved in a printer which combines regular 10-pitch printing and mini-printing without changing the hammer packaging, which remains at 0.1-inch spacing. (Image Omitted) To achieve mini-printing in a conventional printer, the hammer impact surface is rearranged in order to allow the print hammer blocks to be used for mini-printing. The print hammers are still packaged at 0.

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Print Hammer Arrangement for Mini-Printing

It is desirable to have mini-printing in a high-speed line printer, but this is difficult to achieve without changing the print hammer packaging. Most high-speed printers available have hammers packaged at 0.1 in spacing for 10-pitch printing. In order to allow mini-printing at 12, 13.3 or 15 pitch, it has been the situation that a new hammer design was required in order to obtain pitches of more than 10 characters per inch. This problem is solved in a printer which combines regular 10-pitch printing and mini-printing without changing the hammer packaging, which remains at 0.1-inch spacing.

(Image Omitted)

To achieve mini-printing in a conventional printer, the hammer impact surface is rearranged in order to allow the print hammer blocks to be used for mini-printing. The print hammers are still packaged at 0.1-inch spacing, without any modification, but the hammer impact faces are rearranged to have different widths in order to cover the mini- printing. A slight print speed reduction will occur due to the change of the character pitch on the print belt. Fig. 1 illustrates the concept by illustrating a hammer face configuration which can be used to provide both 10-pitch printing and 13.3-pitch printing. The hammers 10 are still packaged at 0.1-inch spacing, but the hammer impact face has widths of 0.075, 0.15, and
0.075 inch arrangement within a 0.3-inch hammer block. For regular printing (10 pitch), each hammer 10 still...