Browse Prior Art Database

Hybrid Gap Roller

IP.com Disclosure Number: IPCOM000118092D
Original Publication Date: 1996-Sep-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 4 page(s) / 61K

Publishing Venue

IBM

Related People

Hada, T: AUTHOR [+3]

Abstract

Disclosed is a gap roller (A) that has a hybrid structure consisting of three layers (core material, elastomer, and ceramic particles) and that is used on a document printer to keep a certain distance between a print head (B) and a document (C).

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Hybrid Gap Roller

      Disclosed is a gap roller (A) that has a hybrid structure
consisting of three layers (core material, elastomer, and ceramic
particles) and that is used on a document printer to keep a certain
distance between a print head (B) and a document (C).

Refer to Fig. 1 (side view of print mechanism) and Fig. 2 (gap
roller).

      The core (D) of the roller is made of a rigid body, such as
stainless steel or aluminum.  The outside of the core is an elastomer
(E) made of rubber.  Most outer parts of this gap roller are made of
ceramic particles (F) fixed closely by an elastic binding material
(G), such as denature silicon.  The surface is ground (H) in order
that the sharp edges may not come out and the surface may be of
uniform unevenness.

Refer to Fig. 3 (enlarged view of detail A).

This hybrid gap roller has the following characteristics:
  1.  The outer surface is coated with ceramic particles, which
       have less affinity for ink.  When this hybrid gap roller
       is rolling on a document which is printed just before and
       the ink is still wet directly, the roller isn't stained
       with ink.  Therefore, the document isn't stained with ink
       by a gap roller.
  2.  Besides, after the second paper of carbon papers or pressure
       sensitive paper, the marks of this hybrid gap roller are
       very light.
  3.  Furthermore, the ceramic particles prevent ink from soaking
    ...