A sheet receiver for a patient repositioning system includes a housing adapted to be supported at a first end of a bed deck and a pulling device located primarily within an internal compartment of the housing. The housing has an access door adapted to open and to close so as to provide access to the internal compartment via an opening, and the housing also has an elongated slot extending along a first end thereof, and spaced from the opening. A connector has an innermost end secured to the pulling device within the internal compartment and an outermost end removably attachable to a sheet located on a mattress supported on the bed deck. The connector spans substantially the length of the slot and may include at least one window near the innermost end, to facilitate cleaning of the internal compartment. The housing includes impeding structure which prevents the inadvertent insertion of the connector and/or the sheet into the internal compartment via the opening.