Textiles: fluid treating apparatus – Machines – Single tub and automatic sequential operation mechanism
Reexamination Certificate
2005-06-03
2009-02-17
Perrin, Joseph L (Department: 1792)
Textiles: fluid treating apparatus
Machines
Single tub and automatic sequential operation mechanism
C068S012060, C068S023100, C068S024000
Reexamination Certificate
active
07490490
ABSTRACT:
The present invention provides a drum type washing machine capable of adequately distributing the laundry articles along the inner circumferential wall of the drum at the start-up of the dehydrating operation with high probability, thereby reducing the start-up time of the dehydration. In an embodiment of the present invention, the drum is controlled to rotate at a constant speed 50 r.p.m. to agitate the laundry articles (Step S12), and the drum speed is almost continuously monitored. If the change in the speed does not exceed 1.5 r.p.m. for 0.5 second (Steps S13through S16), the laundry articles are loosened and easy to distribute. Therefore, the drum speed is raised to 80 r.p.m. (Steps S17and S18). If the eccentric load detected at this speed does not exceed a predetermined value (Steps S19and S20), the laundry articles are adequately distributed along and pressed onto the inner circumferential wall of the drum. If a sudden change in the speed has been detected within a short period of time that is less than 36 milliseconds (Step S22), the laundry articles are tangled in a mass form. Therefore, the rotating direction of the drum is reversed, and the agitating direction is restarted in the opposite direction (Step S21).
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Hirasawa Yuji
Kawaguchi Tomonari
Perrin Joseph L
Sanyo Electric Co,. Ltd.
Westerman, Hattori, Daniels & Adrian , LLP.
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