Recording apparatus and paper feeding method

Patent metadata

Field	Value
Publication number	US-12459772-B2
Application number	US-202318318600-A
Country	US
Kind code	B2
Filing date	May 16, 2023
Priority date	May 20, 2022
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A recording apparatus having a support portion that supports a roll having a wound sheet, a drive portion, a conveying passage, a conveyer, and a recording portion. The drive portion rotates the supported roll in a first direction to feed the sheet from the roll, and rotates the roll in a second direction to rewind the sheet onto the roll. The conveying passage guides the sheet fed from the roll in a feeding direction and has first and second positions upstream of the conveyer in the feeding direction. The drive portion performs, before the sheet reaches the conveyer, a reciprocating operation in which the drive portion rotates the roll in the second direction in response to a leading end of the sheet reaching the first position and rotates the roll in the first direction in response to the leading end which reached the first position reaching the second position.

First claim

What is claimed is:

1 . A recording apparatus comprising:
a support mechanism configured to rotatably support a roll around which a sheet is to be wound; a driving mechanism configured to rotate the roll supported by the support mechanism in a first direction to feed the sheet from the roll, and rotate the roll in a second direction that is opposite to the first direction to rewind the sheet onto the roll; a conveying passage configured to guide the sheet fed from the roll supported by the support mechanism in a feeding direction; a conveyer disposed on a downstream side of the conveying passage in the feeding direction to convey the sheet; a recording head configured to record an image on the sheet conveyed by the conveyer; and a detector for detecting a position of a leading end of the roll, wherein the conveying passage has a first position upstream of the conveyer in the feeding direction and a second position upstream of the first position in the feeding direction, wherein the driving mechanism is configured to perform, before the sheet reaches the conveyer, a reciprocating operation in which the driving mechanism rotates the roll in the second direction in response to a to the leading end of the sheet reaching the first position and rotates the roll in the first direction in response to the leading end which reached the first position reaching the second position, wherein the detector is a plurality of optical sensors configured to project light and determine whether the sheet is at a corresponding position based on a presence or absence of reflected light, and wherein the plurality of optical sensors includes a first sensor located at a position corresponding to the first position and a second sensor located at a position corresponding to the second position.

2 . The recording apparatus according to claim 1 , wherein the driving mechanism is configured to repeat the reciprocating operation a plurality of times.

3 . The recording apparatus according to claim 1 , further comprising a flange facing both end surfaces of the roll in a width direction to restrict a position of the roll in the width direction.

4 . The recording apparatus according to claim 3 ,
wherein the flange supports the roll from both ends in the width direction, and is attachable to and detachable from a main body of the recording apparatus.

5 . The recording apparatus according to claim 1 , further comprising a pressure roller assembly configured to press an outer circumference surface of the roll.

6 . The recording apparatus according to claim 5 , wherein the pressure roller assembly is a plurality of rollers arranged in a width direction of the roll.

7 . The recording apparatus according to claim 1 ,
wherein the conveying passage has an upper surface and a lower surface that extend horizontally to form the conveying passage, and wherein a projection portion is provided to project upward with respect to a gravitational direction from the lower surface at an end portion of the lower surface on an upstream side in the feeding direction.

8 . The recording apparatus according to claim 7 ,
wherein the lower surface includes a first guide portion located downstream of the projection portion in the feeding direction and a second guide portion located downstream of the first guide portion in the feeding direction, and the lower surface transitions from the second guide portion to the first guide portion so as to bend downward in the gravitational direction, and wherein the first guide portion extends upstream of an upstream end of the upper surface in the feeding direction.

9 . A paper feeding method for a recording apparatus, wherein the recording apparatus includes a support mechanism configured to rotatably support a roll around which a sheet is to be wound, a driving mechanism configured to rotate the roll supported by the support mechanism in a first direction to feed the sheet from the roll, and rotate the roll in a second direction that is opposite to the first direction to rewind the sheet onto the roll, a conveying passage configured to guide the sheet fed from the roll in a feeding direction, a conveyer disposed on a downstream side of the conveying passage in the feeding direction to convey the sheet, and a recording head configured to record an image on the sheet conveyed by the conveyer, the paper feeding method comprising:
rotating, as a first rotating, the roll by the driving mechanism in the second direction in response to a leading end of the sheet reaching a first position in the conveying passage that has yet to reach the conveyer, and rotating the roll by the driving mechanism in the first direction in response to the leading end reaching a second position located upstream of the first position in the conveying passage after reaching the first position; and rotating, as a second rotating, the roll by the driving mechanism in the first direction so that the sheet reaches the conveyer, wherein the first rotating is repeated a plurality of times before the second rotating.

10 . The paper feeding method according to claim 9 , wherein the first rotating is started when a user manually feeds the leading end of the sheet to reach the first position.

Assignees

• Canon Kk

Inventors

• Ikeda Yuki
• Harigae Ryo
• Watanabe Hikaru

Classifications

• H04N1/1215 Primary

  Feeding using one or more cylindrical platens or rollers in the immediate vicinity of the main scanning line · CPC title

• H04N1/123

  Using a dedicated sheet guide element · CPC title

• H04N1/1225

  Means for maintaining contact between the sheet and the image sensor, e.g. pressing means · CPC title

• H04N1/00575

  Inverting the sheet prior to refeeding · CPC title

• B65H2601/326

  Manual handling of handling machine · CPC title