Patent ID: 6856785
Filing Date: 2005-02-15
Classification: G03G

Abstract:
1. A scuffing device, comprising: a scuffer arm; an extending/retracting device connected to the scuffer arm; a drive subsystem connected to the extending/retracting device; and an engagement control device, wherein: the drive subsystem drives the extending/retracting device between a first engaging position that allows the scuffer arm, when extended, to engage a surface to be scuffed and a second disengaging position that, when the scuffer arm is extended, disengages the scuffer arm from the surface to be scuffed; when the drive subsystem drives the extending/retracting device in a first direction, the engagement control device controls a position of the scuffer arm relative to the surface to be scuffed as the extending/retracting device extends the scuffer arm from a first, retracted position to a second, extended position where the scuffer arm is able to engage the surface to be scuffed, and when the drive subsystem drives the extending/retracting device in a second direction, the engagement control device controls a position of the scuffer arm relative to the surface to be scuffed as the extending/retracting device retracts the scuffer arm from the second, extended position to the first, retracted position.