APPARATUS FOR FORMING LOOP ON TUBULAR PIECE TO COMPENSATE FOR DIFFERENCE IN LENGTH THEREOF FOR MANUFACTURING BAG

摘要

Sections of bag-making material are successively and intermittently fed by double belt conveyors to arrive beneath a vertically reciprocatable push member which engages each section by suction and forms a central loop in each section while its ends are yieldingly engaged by brake shoes co-operating with side supports.