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Ribbonless Flexographic Printer

IP.com Disclosure Number: IPCOM000073781D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Ett, AH: AUTHOR [+2]

Abstract

A flexible belt 10 is driven by roller 12 and is returned around another roller, not shown. Belt 10 has a porous inner layer 14 which is impregnated with ink. An ink impervious flexible outer layer 16 prevents ink from contacting roller 12 or hammer 18. Desired print characters such as characters 20 and 22 are molded into the outer surface of belt 10, as raised areas. The cross section of character 22 shows how the porous inner layer 14 extends out from the center of the belt to the face 24 of the molded character. Ink impervious layer 16 extends over the side of the characters but does not cover the face 24 of the characters.

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Ribbonless Flexographic Printer

A flexible belt 10 is driven by roller 12 and is returned around another roller, not shown. Belt 10 has a porous inner layer 14 which is impregnated with ink. An ink impervious flexible outer layer 16 prevents ink from contacting roller 12 or hammer 18. Desired print characters such as characters 20 and 22 are molded into the outer surface of belt 10, as raised areas. The cross section of character 22 shows how the porous inner layer 14 extends out from the center of the belt to the face 24 of the molded character. Ink impervious layer 16 extends over the side of the characters but does not cover the face 24 of the characters.

Hammer 18 acts to drive flexible belt 10 into contact with a nonuniform document such as a mail envelope 30 containing a folded letter 32. The flexibility of characters 22 allows it to conform to the nonuniform surface of envelope 30 and prints the character clearly without leaving voids in the printed image. As character 22 conforms to the envelope surface it is spread out and therefore, contacts a wider area where the document is thick, but contacts a narrower area where the document is thin. The resulting printed image remains of uniform width in all areas, however, because ink is only released from the porous face 24 of character 22. Impervious layer 16 prevents ink from being released from the sides of character 22 even though they are in contact with the surface of envelope 30 in some areas.

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