Browse Prior Art Database

04-82 p5511-5512. Type Element for a Ribbonless Impact Printer

IP.com Disclosure Number: IPCOM000048945D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Helinski, EF: AUTHOR

Abstract

A type element for a ribbonless impact printer comprises a flexible metal band 10 (Fig. 1) having engraved porous characters 11 attached thereto by means such as eyelets 12. A compressible fluid transfer medium 13 is sandwiched between characters 11 and band 10. The engraved characters have top and bottom surfaces with open pores. These pores may be produced by using sintered metal technology. The pores serve as an inlet and outlet for ink which enters from the bottom from the fluid transfer medium 13 and flows through the pores to the top surface. Fluid transfer medium 13 has wick-like characteristic. Ink roll 14 (Fig. 4) applies inking fluid to transfer medium 13 as the type element is rotated around pulleys 15 and 16.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 73% of the total text.

Page 1 of 2

04-82 p5511-5512. Type Element for a Ribbonless Impact Printer

A type element for a ribbonless impact printer comprises a flexible metal band 10 (Fig. 1) having engraved porous characters 11 attached thereto by means such as eyelets 12. A compressible fluid transfer medium 13 is sandwiched between characters 11 and band 10. The engraved characters have top and bottom surfaces with open pores. These pores may be produced by using sintered metal technology. The pores serve as an inlet and outlet for ink which enters from the bottom from the fluid transfer medium 13 and flows through the pores to the top surface. Fluid transfer medium 13 has wick-like characteristic. Ink roll 14 (Fig. 4) applies inking fluid to transfer medium 13 as the type element is rotated around pulleys 15 and 16. Transfer medium 13 absorbs ink from roll 14 and supplies ink to the back surface of the porous character 11 through capillary action. Transfer medium 13 serves as an intermediate reservoir which, when compressed, transfers a small quantity of ink into characters 11. The lateral surfaces 19 (Fig. 3) of characters 11 can be sealed off by some suitable means such as selective plating or epoxy impregnation.

Band 10 is supported by projection 17 (Fig. 2) of a platen 18 during impact of hammers 20. As a reeult of the impact, forces are exerted on transfer medium 13 such that pressure and flow of ink is produced on the ink fluid contained within medium 13. The compressive stresses applied to...