US 2003/0227130 A1 · Skew correction for a media feed mechanism

Abstract

A media feed mechanism includes a picking device, a first feedroller and a second feedroller. The picking device picks a sheet of media from a media source. The first feedroller moves the sheet of media along a feed media path. During a skew correction phase, the first feedroller rolls in a forward direction feeding the sheet of media forward and the second feedroller turns in a reverse direction preventing the sheet of media from progressing past a nip of the second feedroller. This results in skew correction. After skew correction is performed, the second feedroller turns in the forward direction advancing the sheet of media for printing.

Claims20

Dependent claims

A media feed mechanism comprising:

a picking device that picks a sheet of media from a media source;
a first feedroller that moves the sheet of media along a feed media path;
and
a second feedroller;
wherein during a skew correction phase, the first feedroller rolls in a forward direction feeding the sheet of media forward and the second feedroller turns in a reverse direction preventing the sheet of media from progressing past a nip of the second feedroller resulting in skew correction;
and
wherein after skew correction is performed, the second feedroller turns in the forward direction advancing the sheet of media for printing.

4 more elements

A method for performing sheet feeding of media, the method comprising:

(a) obtaining a sheet of a media from a source using a picking device;
(b) using a first feedroller to move the sheet of media along a feed media path, including the following:
(b.1) turning the first feedroller in a forward direction during initial feeding of the sheet of media;
(c) feeding the sheet of media past a nip of a second feedroller;
(d) reversing direction of the second feed roller to back the sheet of media in front of the nip of the second feed roller, including the following:
(d.1) halting the first feedroller from turning in the forward direction when the second feedroller backs the sheet of media in front of the nip of the second feedroller;
(e) turning the first feed roller in the forward direction while turning the second feedroller in a reverse direction to correct skew;
and
(f) after skew correction, turning the second feedroller in the forward direction to advance the sheet of media for printing.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/164,181Filed 5 Jun 2002

Published

11 Dec 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

B65H 9/004
Registering, e.g. orientating, articles; Devices therefor: deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet
B65H 9/002
Registering, e.g. orientating, articles; Devices therefor: changing orientation of sheet by only controlling movement of the forwarding means,…
B65H 2301/331
Modifying, selecting, changing orientation: skewing, correcting skew, i.e. changing slightly orientation of material
B65H 2301/512125
Perpendicularly to the direction of displacement of handled material, e.g. forming a loop: by abutting against a stop

Skew correction for a media feed mechanism

Life of this patent

Skew correction for a media feed mechanism

Life of this patent

Abstract

Claims20