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Sheet post-processing apparatus and sheet post-processing method

a post-processing apparatus and sheet technology, applied in the direction of transportation and packaging, thin material processing, article delivery, etc., can solve the problems of sheet deficiency, poor sheet alignment properties, and sheet may not be stably guided

Inactive Publication Date: 2008-12-25
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a sheet post-processing apparatus and method that can stack a large number of sheets without limiting the number of sheets on a processing tray and preventing human fingers from entering a stapler. The apparatus includes a processing tray, a sheet guide, a sheet guide driving mechanism, and a driving control mechanism. The sheet guide can move from a close position to a far position to create a small space between the processing tray and the sheet guide to improve safety and prevent sheet curling. The sheet guide is moved gradually to secure a predetermined space between the processing tray and the sheet guide, even when a small number of sheets are processed. This improves operability of the sheet post-processing apparatus.

Problems solved by technology

Therefore, for example, if this space is increased to make it possible to stack a bundle of about one-hundred sheets, the sheets may not be able to be stably guided because the space is increased to be too large and some of the sheets may curl when the sheets are about to be stacked on the processing guide.
As a result, sheet aligning properties are poor and it is likely that a deficiency occurs in the staple processing and the like.
Moreover, when the space is set wide in this way, human fingertips reach the inside of a stapler through the space between the processing tray and the sheet guide, it is likely that an accident occurs.
As a result, the number of sheets that can be stapled is limited.

Method used

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  • Sheet post-processing apparatus and sheet post-processing method

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Embodiment Construction

[0035]Embodiments of the present invention will be hereinafter explained in detail with reference to the accompanying drawings.

(Overview of an Image forming Apparatus)

[0036]An overview of an image forming apparatus (a digital copying machine) and a post-processing apparatus according to an embodiment of the present invention arranged to be connected to a post-stage of the image forming apparatus are explained with reference to FIG. 1. In the image forming apparatus, an original placing stand 112 is provided on an upper surface thereof. An automatic document feeder 107 (hereinafter referred to as ADF) that automatically feeds an original D onto the original placing stand 112 is arranged on the original placing stand 112. After placing the original D on the ADF and performing predetermined setting (e.g., presence or absence of staple processing, a way of the staple processing, the number of copies, and a size of a sheet to be copied), a user presses a copy start switch. The original D...

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Abstract

In a sheet post-processing apparatus, a sheet guide is arranged above a processing tray that aligns stacked one or plural sheets. The sheet guide is moved by racks to be spaced apart from or brought close to the processing tray. The racks are controlled to be driven on the basis of the number of sheets stacked on the processing tray or the thickness of a stack of the sheets to adjust a space between the processing tray and the sheet guide.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Applications No. 60 / 944,820, filed Jun. 19, 2007; No. 60 / 944,824, filed Jun. 19, 2007; and No. 60 / 944,825, filed Jun. 19, 2007.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a sheet post-processing apparatus with an improved sheet guide and a sheet post-processing method.[0004]2. Description of the Related Art[0005]A sheet post-processing apparatus is an apparatus that stacks plural sheets on a processing tray and, after aligning these sheets, performs post processing such as staple processing and sort processing of the sheets, and discharges a processed sheet bundle to a stacking tray after the post processing.[0006]The sheet post-processing apparatus includes a sheet guide above the processing tray. However, the sheet guide is fixed in a predetermined position. A space between an upper surface of the processing tray and a ceiling su...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65H39/00
CPCB65H2407/10B65H2511/152B65H2511/20B65H2511/415B65H2801/27B65H2220/01B65H2220/02B65H29/52B65H31/02B65H2301/4212B65H2301/4213B65H2405/11151B65H31/3081B65H2511/15
Inventor TERAO, YASUNOBUYAMAMOTO, MIKIO
Owner KK TOSHIBA
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