Thermal printer and method for using

• US 5,762,431 A
• Filed: 02/10/1997
• Issued: 06/09/1998
• Est. Priority Date: 02/10/1997
• Status: Expired due to Term

• Current Assignee: Entrust Datacard Corporation (Entrust Corp.)
• Original Assignee: Datacard Corp. (Entrust Corp.)
• Inventors: Pawelka, Gerhard Eduard-Franz, Ambrosina, Jesse Erin
• Primary Examiner(s): Eickholt, Eugene H.
• Application Number:
  US08/797,873
• Time in Patent Office: 484 Days
• Field of Search: 400/642, 400/120.16, 400/625, 271/225, 271/902, 271/264, 347/215, 347/216, 347/217, 347/218
• US Class Current: 400/642
• CPC Class Codes: B41J 13/0045 concerning sheet refeed sections of automatic paper handling systems, e.g. intermediate stackers printing on both faces B41J3/60
• CPC Class Codes: B41J 13/12 specially adapted for small cards, envelopes, or the like , e.g. credit cards, cut visiting cards
• CPC Class Codes: B65H 2301/4212 of articles substantially horizontal
• CPC Class Codes: B65H 2403/942 Bidirectional powered handling device
• CPC Class Codes: B65H 2404/692 Chute, e.g. inclined surface on which material slides by gravity
• CPC Class Codes: B65H 2405/11152 with surface inclined downwardly in transport direction
• CPC Class Codes: B65H 29/52 Stationary guides or smoothers
• CPC Class Codes: B65H 31/02 with stationary end support against which pile accumulates
• CPC Class Codes: Y10S 271/902 Reverse direction of sheet movement

Abstract

The present invention relates to a thermal printer for printing a card. The printer includes a housing having an input/output end configured for both inputting the card into the housing and outputting the card from the housing. A print head is positioned within the housing for printing the card. A card input station and a card output station are located at the input/output end of the housing. A stationary diverter ramp is positioned between the input/output end of the housing and the print head. The diverter ramp has a sloped diverting surface generally facing away from the input/output end of the housing. The printer is also equipped with a mechanism for feeding the card from the input station, past the diverter ramp, to the print head. The printer further includes a mechanism for reversing direction of the card and feeding the card from the print head back towards the diverter ramp such that the card engages the sloped diverting surface of the diverter ramp and is directed toward the output station.

Claims

1. A thermal printer for printing a substrate, the printer comprising:

a housing having an input/output end configured for both inputting the substrate into the housing and outputting the substrate from the housing;

a print head positioned within the housing for printing the substrate;

an input station positioned at the input/output end of the housing;

an output station positioned at the input/output end of the housing;

a stationary diverter ramp positioned between the input/output end of the housing and the print head, the diverter ramp having a sloped diverting surface generally facing away from the input/output end of the housing;

a transport mechanism constructed and arranged to move the substrate from the input station, past the diverter ramp, to the print head, and to reverse direction of the substrate and move the substrate from the print head back towards the diverter ramp such that the substrate engages the sloped diverting surface of the diverter ramp and is diverted toward the output station.

2. The printer of claim 1, wherein the transport mechanism includes a printing platform positioned adjacent to the print head for supporting the substrate as the substrate is printed, and an intermediate ramp positioned between the diverter ramp and the printing platform for guiding the substrate as the substrate travels between the diverter ramp and the printing platform.

3. The printer of claim 2, wherein the printing platform, the intermediate ramp, and the diverter ramp are unitarily formed as a one-piece unit.

4. The printer of claim 2, wherein at least a portion of the printing platform is aligned generally along an output path plane that intersects the diverting surface of the diverter ramp, and the intermediate ramp includes a guide portion generally aligned with the output path plane.

5. The printer of claim 2, wherein the transport mechanism further includes a pick roller positioned at the input station, a first driven roller positioned between the diverter ramp and the intermediate ramp, and a second driven roller positioned between the intermediate guide ramp and the printing platform.

6. A thermal printer for printing a substrate, the printer comprising:

a housing having an input/output end configured for both inputting the substrate into the housing and outputting the substrate from the housing;

a print head positioned within the housing for printing the substrate;

an input hopper positioned at the input/output end of the housing;

an output hopper positioned at the input/output end of the housing below the input hopper;

a stationary diverter ramp positioned between the input/output end of the housing and the print head, the diverter ramp having a front side generally facing the input/output end of the housing, and a back side generally facing away from the input/output end of the housing;

a printing platform positioned adjacent to the print head, at least a portion of the printing platform being aligned along an output path plane that intersects the back side of the diverter ramp; and

an intermediate ramp positioned between the diverter ramp and the printing platform for guiding the substrate as it travels between the diverter ramp and the printing platform.

7. The printer of claim 6, wherein a portion of the intermediate ramp is aligned with the output path plane.

8. The printer of claim 6, wherein the intermediate ramp is positioned below the diverter ramp, the intermediate ramp includes a guide surface aligned along an input path plane, the diverter ramp has a top edge over which the substrate is fed when inputted from the input station, and the top edge is aligned generally with the input path plane.

9. A printer for printing a substrate, the printer comprising:

a housing having an input/output end configured for both inputting the substrate into the housing and outputting the substrate from the housing;

a print head positioned within the housing for printing the substrate;

an input station positioned at the input/output end of the housing;

an output station positioned at the input/output end of the housing;

a stationary diverter ramp positioned between the input/output end of the housing and the print head, the diverter ramp having a sloped diverting surface generally facing away from the input/output end of the housing;

means for feeding the substrate from the input station, past the diverter ramp, to the print head; and

means for reversing direction of the substrate and feeding the substrate from the print head back towards the diverter ramp such that the substrate engages the sloped diverting surface of the diverter ramp and is diverted toward the output station.

10. A method for printing a substrate with a thermal printer, the printer including an input/output end having an input station and an output station, a print head, and a stationary diverter ramp positioned between the input/output end and the print head, the method comprising the steps of:

inputting the substrate in the input station of the input/output end of the printer;

moving the substrate from the input station of the printer toward the print head;

guiding the substrate past the stationary diverter ramp to a print region located generally adjacent to the print head;

printing the substrate at the print region;

moving the substrate from the print region toward the input/output end of the printer;

diverting the substrate with the stationary diverter ramp such that the substrate is directed toward the output station of the printer.

11. The method of claim 10, wherein the substrate comprises a plastic card.