Sheet feeding or delivering – Feeding – Separators
Patent
1995-11-21
1997-04-01
Milef, Boris
Sheet feeding or delivering
Feeding
Separators
271127, 271149, 271160, 271161, B65H 352, B65H 102
Patent
active
056158742
ABSTRACT:
A media separation system is provided for separating individual sheets from a stack of media. The media separation system has a pressure plate positioned at an angle to support the stack of sheets along an incline. The pressure plate has an upper and lower end, with a relieved area formed in the lower end of the pressure plate. The media separation system also has a pick roller disposed in juxtaposition to the relieved area of the pressure plate to engage and separate a top sheet from the stack of sheets. The pick roller has a width that is more narrow than that of the relieved area in the pressure plate. A spring-like mechanism is provided to urge the pressure plate toward the pick roller to cause the pick roller and the pressure plate to work cooperatively to depress the sheets of media beneath the pick roller into the relieved area of the pressure plate. This causes formation of a primary depression in the stack of sheets. The media separation system further includes a ribbed surface positioned elevationally below the pressure plate and pick roller to support and register leading edges of the stack of sheets. The ribbed surface has a raised rib positioned centrally beneath the pick roller to create a secondary depression in the stack of sheets that bows in an opposite direction from the primary depression. The dual depressions create a distinct shape that enables the top sheet to separate easily from the stack when the pick roller is rotated.
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patent: 5480247 (1996-01-01), Saikawa et al.
Huang Pui W.
Ng Lian H.
Parthasarathy Baskar
Sum Yuh W.
Hewlett--Packard Company
Milef Boris
LandOfFree
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