Transport Apparatus and Printer Apparatus

Patent metadata

Field	Value
Publication number	US-2016272452-A1
Application number	US-201615067917-A
Country	US
Kind code	A1
Filing date	Mar 11, 2016
Priority date	Mar 20, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

A transport apparatus includes a driving roller that transports a medium in a transport direction, a driven roller that presses the medium against the driving roller when the medium is transported, a changer that changes a pressing force by which the driven roller presses the medium against the driving roller, and a feeder configured to feed the medium toward the driving roller and pull back the medium in a direction opposite to the transport direction. Before the driving roller transports the medium, the feeder pulls back the medium after the changer has changed the pressing force to a value that is smaller than the value of the pressing force set for transport of the medium.

First claim

What is claim is:

1 . A transport apparatus comprising:
a driving roller that transports a medium in a transport direction; a driven roller that presses the medium against the driving roller when the medium is transported; a changer that changes a pressing force by which the driven roller presses the medium against the driving roller; and a feeder configured to feed the medium toward the driving roller and pull back the medium in a direction opposite to the transport direction, wherein before the driving roller transports the medium, the feeder pulls back the medium after the changer has changed the pressing force to a value that is smaller than the value of the pressing force set for transport of the medium.

2 . The transport apparatus according to claim 1 , further comprising
a controller that controls the driving roller and the feeder, wherein the feeder rotatably holds a roll body that has the medium in a rolled form, and wherein as an operation of adjusting a posture of the medium, the controller causes the driving roller and the feeder to execute the transport of the medium over a predetermined distance in the transport direction based on an amount of rotation of the driving roller and then causes the driving roller and the feeder to execute pull-back of the medium over the predetermined distance based on the amount of rotation of the roll body.

3 . The transport apparatus according to claim 1 , wherein:
the changer includes a spring that provides the pressing force when stretched; and when the feeder pulls back the medium, the changer changes the pressing force to a value that corresponds to the initial tension of the spring.

4 . The transport apparatus according to claim 1 ,
wherein the changer includes: a cam member; a spring that provides the pressing force when stretched; a pivoting member that supports the driven roller for pivotal movement, is connected to a first end of the spring, and is pivotable about a pivot shaft; and a retaining member whose proximal end is supported for pivotal movement by the pivoting member and whose distal end retains a second end of the spring and which, when receiving between the proximal end and the distal end a pressurizing force of the cam member, pivots about the proximal end in such a direction that the distal end stretches the spring, and wherein the retaining member is supported by the pivoting member in such a manner that position of the proximal end is changeable without changing the length of the spring.

5 . A printing apparatus comprising:
the transport apparatus according to claim 1 ; and a printer that performs printing on the medium transported by the transport apparatus.

Assignees

• Seiko Epson Corp

Inventors

• Tokai Yoshitsugu
• Hayashi Toru
• Onishi Ryoichi

Classifications

• B41J15/00 Primary

  Devices or arrangements {of selective printing mechanisms, e.g. ink-jet printers or thermal printers,} specially adapted for supporting or handling copy material in continuous form, e.g. webs · CPC title

• B65H2404/1441

  involving controlled actuator · CPC title

• B65H2801/36

  Plotting · CPC title

• B65H2403/514

  involving eccentric · CPC title

• B65H20/02 Primary

  by friction roller · CPC title