Patent ID: 9096013
Filing Date: 2015-08-04
Classification: B29C

Abstract:
1. An apparatus for forming slant, linear easy-to-tear portions on a long plastic film, comprising: (a) a roll on which the long plastic film passes; (b) pluralities of pattern rolls each partially having a slant, linear stamp means having pattern projections on a rolling surface; (c) a shaft to which the pluralities of the pattern rolls are fixed; (d) a first moving mechanism for moving said shaft in a direction to said roll, on which the long plastic film passes; (e) pressure rolls pushing said pattern rolls directly or indirectly via rolls fixed to said shaft, which have a smaller diameter than that of the pattern rolls; and (f) a second moving mechanism for moving said pressure rolls in a direction to said pattern rolls, whereby with said pressure rolls pushing said pattern rolls directly or indirectly by said second moving mechanism, the stamp means of said pattern rolls are pressed onto said plastic film by said first moving mechanism, so that the slant, linear easy-to-tear portions with recesses formed by the pattern projections of said stamp means are provided partially and periodically on said plastic film.