APPARATUS FOR FORMING ARTICLES FROM THERMOPLASTIC SHEET MATERIAL

摘要

Apparatus is disclosed in which equal lengths of sheet material are advanced step by step through an article-forming station and one or more subsequent stations such as printing and blanking and stacking stations. Means are provided that establish a positive but adjustable step length with a timer-controlled dwell and a positive lock against movement of the material during a dwell. Each subsequent station is provided with means enabling its coacting members to be positioned lengthwise as required by the step length being used. In addition, the positions of the coacting members at the printing station are adjustable transversely as is the distance between the margin gripping chains of the material-advancing means.