Paper-feeding mechanism against tilt

Abstract

A paper feeding mechanism able to prevent the skew of fed paper is composed of a paper advancing roller, a paper separating roller at the downstream of paper advancing roller, a paper separating plate close to said paper separating roller and with an arc paper-separating part, a pressure regulating unit with a pressure-applying spherical part, and a pressing plate of paper-separating plate with a recess on its back for matching with said pressure-applying spherical part.

Description

technical field [0001] The invention relates to a paper feeding mechanism, in particular to a paper feeding mechanism capable of preventing skewed paper feeding. Background technique [0002] For early computer users, scanners were rare peripherals. Early scanners were usually used in professional digital image processing work due to their high price and difficult operation. However, with the development of digital imaging technology, many cheap and easy-to-use scanners have flooded into the market. In the past few years, they have become an indispensable part of personal or small office computer systems. [0003] Generally, common scanners can be divided into two mainstreams: flatbed and sheet-fed. Among them, flatbed is the most popular scanner type in SOHO. A flatbed scanner is designed like a small copier, where paper, books or other items to be scanned are placed on a flat glass for scanning. Moreover, with the development of scanning technology, not only two-dimens...

AI Technical Summary

Problems solved by technology

Further, if the paper separation sheet 18 cannot be accurately assembled on the paper separation roller 16, that is, the direction of the rear edge of the paper separation part 18a of the aforementioned paper separation sheet 18 (ie, the left edge of the paper separation part 18a in the figure) There is a deviation from the axial direction of the separation roller 16

Since the front edge of the paper S is first trimmed to the rear edge of the aforementioned paper separation part 18a during the paper feeding process, and then fed into the automatic document feeder, the skew of the paper feeding is unavoidable.

[0008] Secondly, since the paper separation piece 18 is fixed, the gap between the paper separation part 18a and the paper separation roller 16 is limited within a certain range.

Therefore, when the thickness of the paper S used changes significantly, the size of the gap cannot be adjusted accordingly, which may cause difficulties in paper feeding or multiple feeds.

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