Facsimile and static presentation processing – Facsimile – Picture signal generator
Reexamination Certificate
1998-03-02
2001-12-11
Lee, Cheukfan (Department: 2722)
Facsimile and static presentation processing
Facsimile
Picture signal generator
C358S474000
Reexamination Certificate
active
06330084
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a flatbed scanner, and more particularly, to a flatbed scanner with a self-driven scanning module.
2. Description of the Prior Art
Image scanners are commonly used for scanning documents into computers. The most commonly used scanners are flatbed scanners. The scanning module of a prior art flatbed scanner is installed under a transparent platform for scanning a document placed on the transparent platform. The scanning module does not have any self-driven device mounted on its body to drive the scanning module directly, and thus requires a driving device installed inside the scanner to pull it back and forth along a track mechanism, maintain its balance and scanning direction, etc. The driving device usually comprises a stepping motor, several wheels rotatably fixed at various positions inside the scanner, and a connecting mechanism such as steel strips or a circular belt mounted on the wheels for pulling the scanning module. The structures of such prior art driving devices are usually quite complex which are very costly and difficult to install or maintain.
SUMMARY OF THE INVENTION
It is therefore a primary objective of the present invention to provide a flatbed scanner with a self-driven scanning module which can greatly simplify the driving mechanism of the scanner.
In a preferred embodiment, the present invention provides a scanner comprising:
a housing having a transparent platform on its top for placing a document;
a track mechanism installed inside the housing along a front-and-rear direction of the housing;
a scanning module mounted on the track mechanism slidable along the front-and-rear direction for scanning the document; and
a driving device installed on the scanning module having a roller wheel and a motor for driving the roller wheel to move the scanning module back and forth along the track mechanism.
It is an advantage of the present invention that the flatbed scanner comprises a self-driven scanning module which greatly simplifies the driving mechanism of the scanner.
This and other objectives and the advantages of the present invention will no doubt become obvious to those of ordinary skill in the art after having read the following detailed description of the preferred embodiment which is illustrated in the various figures and drawings.
REFERENCES:
patent: 4525748 (1985-06-01), Carbone
patent: 5235353 (1993-08-01), Hirano et al.
patent: 5669048 (1997-09-01), Nishio et al.
patent: 6072602 (2000-06-01), Sun et al.
Hsu Winston
Lee Cheukfan
Primax Electronics Ltd.
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