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Sheet conveyance apparatus and image forming apparatus

a technology of conveyancing apparatus and sheet, which is applied in the direction of registering devices, thin material processing, article separation, etc., can solve the problem of limiting (i.e., an upper limit) to an amount of the registration roller pair

Inactive Publication Date: 2015-04-30
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a machine that moves sheets of material. It has a system that detects the edge of a sheet and moves the machine to prevent the sheet from hitting the edges. The system also analyzes the data and alerts the operator if there is any problem with the sheet. This helps to prevent damage and improve efficiency in the production process.

Problems solved by technology

However, there is a limit (i.e., an upper limit) to an amount the registration roller pair is movable in the width direction.

Method used

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  • Sheet conveyance apparatus and image forming apparatus
  • Sheet conveyance apparatus and image forming apparatus
  • Sheet conveyance apparatus and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

Configuration of Image Forming Apparatus

[0015]A first exemplary embodiment of the present invention will be described below with reference to the drawings.

[0016]FIG. 7 is a schematic cross-sectional view illustrating a color digital printer as an example of an image forming apparatus in which a sheet conveyance apparatus according to the present invention is included.

[0017]Image forming units in the image forming apparatus will be described below. Referring to FIG. 7, surfaces of four photosensitive drums 101a, 101b, 101c, and 101d are uniformly charged by respective charging rollers 102a, 102b, 102c, and 102d. Yellow (Y), magenta (M), cyan (C), and black (K) image signals are respectively input to laser scanners 103a, 103b, 103c, and 103d. The laser scanners 103a, 103b, 103c, and 103d then irradiate the drum surfaces with laser beams according to the input image signals, neutralize the charges, and forms latent images.

[0018]Developing units 104a, 104b, 104c, and 104d respectively d...

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Abstract

A sheet conveyance apparatus includes a moving unit configured to move a conveyance unit nipping the sheet in the width direction such that in a case where the position of the end of the sheet in the width direction detected by the detection unit is separated from a reference position by an amount which is greater than a first predetermined amount and less than or equal to a second predetermined amount, the moving unit to move the conveyance unit by a third predetermined amount which is less than or equal to the first predetermined amount, and to perform control, in a case where the position of the end of the sheet in the width direction detected by the detection unit is separated from the reference position by an amount which is greater than the second predetermined amount, to perform abnormality processing.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a sheet conveyance apparatus which conveys sheets and an image forming apparatus including the sheet conveyance apparatus.[0003]2. Description of the Related Art[0004]Conventionally, an image forming apparatus which forms an image on a sheet includes a width direction correction mechanism for correcting a position of the sheet in a direction perpendicular to a sheet conveying direction of the sheet (i.e., in a width direction).[0005]Japanese Patent Application Laid-Open No. 2013-126914 discusses a width direction correction mechanism as follows. The width direction correction mechanism includes a detection unit which detects an end of the sheet in the width direction, and moves the sheet in the width direction based on a detection result of the detection unit. More specifically, Japanese Patent Application Laid-Open No. 2013-126914 discusses detecting the end of the sheet using a contact...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65H7/06B65H9/00B65H7/20B65H5/06
CPCB65H7/06B65H7/20B65H9/002B65H5/068B65H5/062B65H7/10B65H2403/41B65H2403/512B65H2404/1424B65H2404/1441B65H2404/611B65H2511/10B65H2511/222B65H2511/414B65H2551/20B65H2557/23B65H9/006B65H2404/1341B65H2404/174B65H2511/20B65H2801/06B65H2220/01B65H2220/03B65H2220/02
Inventor DENO, KOHEI
Owner CANON KK