Apparatus for trimming articles moldingly formed on plastic sheet

An apparatus for trimming a plastic sheet on which articles are moldingly formed with longitudinally and transversely extended ridges around the articles, comprising a plurality of first sets of assemblies, each of said first sets of assemblies comprising a first knife, an upwardly protruded and longitudinally extended first rib member, first support means for supporting said first knife and said first rib member, first drive means for longitudinally driving said knife parallel to said first rib member, and first adjusting means for adjusting the position of said first support means in a transverse direction;

• a plurality of second sets of assemblies, each of said second sets of assemblies comprising a second knife, an upwardly protruded and transversely extended second rib member, second support means for supporting said second knife and said second rib member, second drive means for transversely driving said second knife prarallel to said second rib member and second adjusting means for adjusting the position of said second support means in a longitudinal direction;
• a pair of endless link chains each having a plurality of chains for gripping side edges of said plastic sheet;
• first movable means for vertically moving said first sets of assemblies between a raised position where the first knives engage the plastic sheet and the longitudinally extended first rib members fit in the longitudinally extended ridge of the plastic sheet and a lowered position such that when said first movable means is in said raised position, said first knives sever said plastic sheet in a longitudinal direction;
• and second movable means for vertically moving said second sets of assemblies between a raised position where the second knives engage the plastic sheet and the transversely extended second extended rib members fit in the transversely extended ridges of the plastic sheet and a lowered retracted position such that when said second movable means is in said raised position, said second knives sever said plastic sheet in a transverse direction.