infeed station to a case outfeed station first and second side conveying units extend between the infeed station and the outfeed station the first and second side conveying units are moveable toward and away from the conveyance path for engaging opposite sides of cases to move cases of various widths from the infeed station toward the outfeed station a lower tape head assembly is positioned along the conveyance path to apply tape to case bottoms the lower tape head assembly is movable between a lowered position for taping and a raised position for changing tape an upper tape head assembly is positioned along the conveyance path to apply tape to case tops the upper tape head assembly is vertically movable to accommodate cases of various heights a control system controls movement of the first and second side conveying unit the upper tape head assembly and the lower tape head assembly the control system includes one or more of a multi size case mode a case size lock mode and a tape change mode application_number US 85387407 A description referring to fig1 a case sealing apparatus 10 is provided that accommodates cases of various sizes and that provides increased throughput of similarly or same size cases therethrough as will be described in greater detail below the case sealing apparatus 10 has multiple modes including a multi size case mode for sealing cases of varying dimensions a case size lock mode for sealing cases having substantially the same dimensions and a tape change mode for increased tape accessibility the case sealing apparatus 10 includes a frame 12 with a conveyor.