Incremental printing of symbolic information – Ink jet – Medium and processing means
Patent
1997-10-27
1999-06-15
Fuller, Benjamin R.
Incremental printing of symbolic information
Ink jet
Medium and processing means
226190, 226193, 400641, 271226, 271268, B41J 1322
Patent
active
059126906
ABSTRACT:
A recording medium transporting apparatus is shown including a rowel spur. The rowel spur is designed to control the amount of ink adhering to the rowel spur, thus preventing image quality problems associated with slippage between the rowel spur and the recording medium and smudging of ink that is not adhered to the recording medium, as well as maintaining good transporting of the recording medium. The recording medium transporting apparatus transports a sheet shaped recording medium by using a rowel spur. Each tooth of the rowel spur is formed with a plate-like radially inner portion having a substantially constant thickness in a direction parallel to the central axis of the rowel spur, and a wedge-shaped radially outer portion. The wedge-shaped portion includes at least one slanted axial face that intersects a side of the tooth facing in the direction parallel to the central axis. The slanted axial face extends from the substantially constant thickness portion of the tooth to the leading edge of the tooth, thereby defining the wedge-shaped end portion. The remaining thickness of the tooth at the leading edge is 0.04 mm or less (0.01 mm or less is preferable). A material having a Vickers hardness of 500 degrees or above is appropriate for the base material of each tooth of the rowel spur. For example, a heat treated product (SUS631EH) of the stainless steel (SUS631H) is appropriate.
REFERENCES:
patent: 5560726 (1996-10-01), Kawaguchi
Endo Noburu
Tsunokami Yutaka
Annick Christina
Fuji 'Xerox Co., Ltd.
Fuller Benjamin R.
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