The exhaust pipe extends through and is supported by an arm 45 on the slide 46, and connnunicatcs with the exhaust chamber I Original application filed December 11, , Serial No. Blank displacing and elevating control mechanism for stitching machines and the like. This brings the front edge ol the sheet over and against the upper face ol the rotating mandrel The mandrel is detachably secured to a hollow shaft 21 turningin bearings in standards
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