Printer adapted for use with silica-based print media

• US 5,579,694 A
• Filed: 08/30/1995
• Issued: 12/03/1996
• Est. Priority Date: 08/30/1995
• Status: Expired due to Term

• Current Assignee: Yama Capital, LLC
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Mailloux, Dennis R.
• Primary Examiner(s): Eickholt, Eugene H.
• Application Number:
  US08/520,851
• Time in Patent Office: 461 Days
• Field of Search: 101/488, 355/285, 355/286, 355/287, 355/288, 355/289, 355/290, 355/291, 355/279, 355/284, 428/216, 428/36.5, 430/126
• US Class Current: 101/488
• CPC Class Codes: G03G 15/2025 with special means for lubricating and/or cleaning the fixing unit, e.g. applying offset preventing fluid
• CPC Class Codes: G03G 15/2053 Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
• CPC Class Codes: G03G 15/2064 combined with pressure
• CPC Class Codes: G03G 2215/2093 Release agent handling devices

Abstract

An adaptation of a commercially-available printer designed for use with cellulose-based print media is described which transforms the commercially-available printer into a printer that can print on silica-based print media. The printer has an increased heat differential between fuser rollers which are lined with a substantially non-porous elastomeric material to increase release characteristics. The fuser oil assembly is also adapted so as to substantially increase an amount of oil deposited onto the fuser rollers, thereby further increasing release characteristics of the fuser rollers and decreasing adhesion to the silica-based print media.

Claims

1. A method for adapting a conventional printer to print on a silica-based medium, the conventional printer being adapted to print images transmitted from a computer and having a fixing unit for bonding a toner to a cellulose-based print medium;

the bonding being at least partially accomplished using a top fuser roller and a bottom fuser roller where each of the top fuser roller and the bottom fuser roller enclose a top heating element and a bottom heating element, respectively, and the top fuser roller and the bottom fuser roller each having a roller body elongated about a central axis and having a first liner covering the roller body;

the fixing unit further having an oil depositing assembly for depositing oil with an oil roller onto the top fuser roller for a fixed duration prior to receipt of the cellulose-based print medium by the fixing unit and having a retraction system for withdrawing the oil roller from the top fuser roller after the fixed duration;

said method comprising a step of disabling the bottom heating element in the bottom fuser roller thus discontinue thermal radiation from the bottom heating element and decreasing heat propagation to a bottom portion of the silica-based medium.

2. The method of claim 1 further comprising a step of replacing the first liner with a second liner having a high release characteristic so as to inhibit adhesion to the toner and the silica-based print medium.

3. The method of claim 2 wherein the second liner is fabricated from a substantially non-porous elastomer.

4. The method of claim 2 wherein the second liner has a grossly smooth surface having channels allowing movement of ambient gases between the second liner and the silica-based print medium thus substantially inhibiting adhesion due to vacuum.

5. The method of claim 1 further comprising a step of disabling the retraction system such that oil is continuously communicated to the top fuser roller by the oil roller.

6. The method of claim 1 further comprising a step of removing the retraction system or an element thereof such that oil is continuously communicated to the top fuser roller by the oil roller.

7. A printer adapted to print an image communicated from a computer onto a print medium, the printer comprising

feeding means for drawing the print medium into the printer;

transfer means for depositing toner onto the print medium such that the image is formed thus producing an imaged print medium;

fixer means for securing the toner to the imaged print medium, an improvement to the fixer means comprising

a top fuser roller and a bottom fuser roller each having a cylindrical fuser body and a liner where the liner is fabricated from a substantially non-porous elastomer having a grossly smooth surface having channels allowing movement of ambient gases between the second liner and the print medium thus substantially inhibiting adhesion due to vacuum and thermal radiation from the top fuser roller and the bottom fuser roller is restricted to a surface of the imaged print medium having toner deposited thereon; and

transport means for transporting the prim medium out of the printer.

8. A printer adapted for printing an image transmitted by a computer onto a silica-based print medium, said printer comprising

feeding means for drawing the silica-based print medium into the printer,

transfer means for depositing toner onto the silica-based print medium such that the image is formed on the silica-based print medium;

fixer means for creating a heat differential between a top fuser roller and a bottom fuser roller where the silica-based print medium passes between the top fuser roller and bottom fuser roller such that heat bonds the toner therto and the heat differential inhibits adhesion of the silica-based print medium to the top fuser roller and the bottom fuser roller, the top fuser roller in the fixer means comprises a cylindrical roller body elongated about a central axis of rotation and having a bore passing therethrough along the central axis, and a liner covering an outer surface of the cylindrical roller body where the liner is fabricated to have a grossly smooth surface forming passages for ambient gases such that during mechanical contact with the silica-based print medium the ambient gases readily pass along the grossly smooth surface thus inhibiting a vacuum between the silica-based print medium and the grossly smooth surface; and

transport means for transporting the silica-based print medium out of the printer.