METHODS AND APPARATUS FOR WEB HANDLING

摘要

Short lengths are cut from a web (18) of plastics sheet to form tear strips to be inserted in the closure of a laminated cardboard package. The cut strips are captured on a web support drum (14) which rotates at a surface speed higher than the rate of advancement of the web (18). To allow the web (18) to be moving forward at the same speed as the surface of the web support drum (14) at the instant of cut in a cutting station (22), the web is guided to the cutting station (22) along the line of an arm (202) and via a feed roller (244). The arm (202) forms part of a parallel linkage (202, 246 and 204) which is moved forwards and backwards by a connecting rod (290) worked by a crankshaft (292). The cut strips are heat sealed to laminated cardboard carton forming material at spaced intervals therealong.