Continuous form printer with paper guide mechanism

• US 5,592,278 A
• Filed: 11/14/1994
• Issued: 01/07/1997
• Est. Priority Date: 11/13/1993
• Status: Expired due to Fees

• Current Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
• Original Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
• Inventors: Sato, Tsutamu, Monma, Yoshio, Yamaguchi, Hiroyuki, Hirano, Masakazu, Yanashima, Tsukasa
• Primary Examiner(s): LEE, SUSAN SHUK YIN
• Application Number:
  US08/340,336
• Time in Patent Office: 785 Days
• Field of Search: 355/309, 355/282, 355/315, 355/271, 355/274, 355/316, 355/290, 355/211, 226/75, 226/79, 226/81, 226/83, 271/264, 271/272-274
• US Class Current: 399/384
• CPC Class Codes: G03G 15/164 the second base being a continuous paper band, e.g. a CFF
• CPC Class Codes: G03G 2215/00459 Fan fold, e.g. CFF, normally perforated

Abstract

A continuous form electrophotographic printer is provided with a guiding member upstream of a photoconductive drum. The electrophotographic printer retracts paper after it has once passed a fixing unit and been heated, and the guiding unit is provided with an urging member to smooth distorted or wrinkled paper.

Claims

1. An electrophotographic printer using continuous form paper, said printer comprising:

a tractor for feeding the paper along a paper path of said printer;

a photoconductive member upon which a toner image is formed;

transfer means for transferring said toner image to the paper;

fixing means for fixing said toner image to the paper;

a guide member, provided along said paper path upstream of said photoconductive member, for guiding the paper to contact said photoconductive member; and

a center urging member, provided to a center portion of said guide member across a width of the paper, for pushing a center portion of the paper towards said photoconductive member;

wherein said center urging member extends transversely to a direction of feeding of the paper along the paper path, said center urging member further comprising a top edge extending transversely to the direction of feeding of the paper along the paper path;

wherein said guide member comprises a paper contacting edge which contacts and guides the paper; and

wherein said top edge of said center urging member contacts the paper upstream of said guide member paper contacting edge.

2. The printer according to claim 1, wherein said center urging member comprises a resilient flap.

3. The printer according to claim 1,

wherein said center urging member comprises a projection unitarily formed with said guide member.

4. The printer according to claim 1, wherein said center urging member projects slightly into said paper path.

5. A printer using continuous form paper, said printer comprising:

means for feeding the paper along a paper path of said printer;

means for forming an image on the paper;

a guide member, provided upstream of said means for forming along said paper path, for guiding the paper to contact said means for forming; and

a center urging member, provided to a center portion of said guide member across a width of the paper, for pushing a center portion of the paper towards said means for forming;

wherein said center urging member extends transversely to a direction of feeding the paper along the paper path, said center urging member further comprising a top edge extending transversely to the direction of feeding of the paper along the paper path;

wherein said guide member comprises a paper contacting edge which contacts and guides the paper; and

wherein said top edge of said center urging member contacts the paper upstream of said guide member paper contacting edge.

6. The printer according to claim 5, wherein said center urging member comprises a resilient flap.

7. The printer according to claim 6, wherein said resilient flap comprises a resilient plastic flap.

8. The printer according to claim 5, wherein said center urging member comprises a projection unitarily formed with said guide member.

9. The printer according to claim 5, wherein said center urging member projects slightly into said paper path.

10. An electrophotographic printer using continuous form paper, said printer comprising:

a tractor for feeding the paper along a paper path of said printer;

a photoconductive member upon which a toner image is formed;

transfer means for transferring said toner image to the paper;

fixing means for fixing said toner image to the paper;

a guide member, provided along said paper path upstream of said photoconductive member, for guiding the paper to contact said photoconductive member; and

a center urging member, provided to a center portion of said guide member across a width of the paper, for pushing a center portion of the paper towards said photoconductive member;

wherein said center urging member comprises a resilient flap.

11. A printer using continuous form paper, said printer comprising:

means for feeding the paper along a paper path of said printer;

means for forming an image on the paper;

a guide member, provided upstream of said means for forming along said paper path, for guiding the paper to contact said means for forming; and

a center urging member, provided to a center portion of said guide member across a width of the paper, for pushing a center portion of the paper towards said means for forming;

wherein said center urging member comprises a resilient flap.

12. An electrophotographic printer using continuous form paper, said printer comprising:

a tractor for feeding the paper along a paper path of said printer;

a photoconductive member upon which a toner image is formed;

transfer means for transferring said toner image to the paper;

fixing means for fixing said toner image to the paper;

a guide member, provided along said paper path upstream of said photoconductive member, for guiding the paper to contact said photoconductive member; and

a center urging member, provided to a center portion of said guide member across a width of the paper, for pushing a center portion of the paper towards said photoconductive member;

wherein said center urging member extends transversely to a direction of feeding of the paper along the paper path, said center urging member further comprising a top edge extending transversely to the direction of feeding of the paper along the paper path; and

wherein said center urging member comprises a resilient flap.

13. A printer using continuous form paper, said printer comprising:

means for feeding the paper along a paper path of said printer;

means for forming an image on the paper;

a guide member, provided upstream of said means for forming along said paper path, for guiding the paper to contact said means for forming; and

a center urging member, provided to a center portion of said guide member across a width of the paper, for pushing a center portion of the paper towards said means for forming;

wherein said center urging member extends transversely to a direction of feeding the paper along the paper path, said center urging member further comprising a top edge extending transversely to the direction of feeding of the paper along the paper path; and

wherein said center urging member comprises a resilient flap.