Printing plate lock-up assemblies having jaw assembly and registration pin assembly

A print plate lock-up assembly adapted to be received within a gutter of a print plate cylinder, said lock-up assembly comprising:

• (a) an elongate support bar assembly,
• (b) at least one pair of first and second spaced apart jaw assemblies supported by said support bar assembly, said jaw assemblies for positionally clamping a print plate to an exterior circumferential surface of the print plate cylinder, and
• (c) a registration pin assembly supported by said support bar assembly and being shiftable therealong between at least one and another locations, wherein
• each said first and second jaw assemblies include;
• a pair of retainer blocks which are spaced from one another along the support bar assembly;
• a jaw support plate positioned between said pair of retainer blocks and adapted for movement along said pair of retainer blocks towards and away from said support bar assembly;
• a pair of jaw members positioned upon and supported by said jaw support plate;
• and
• spring members acting between said support bar assembly and said jaw support plate so as to exert a bias force against said jaw support plate to move said jaw support plate, and said pair of jaw members supported thereby, in a direction away from said support bar assembly.

A print plate lock-up assembly comprising:

• a support bar assembly adapted to being positioned within a print plate cylinder gutter;
• a jaw assembly supported upon said support bar assembly for positionally locking head and tail edges of a print plate within the print plate cylinder gutter;
• and
• a registration pin assembly which is laterally shiftable between one and another locations within the cylinder gutter;
• wherein said registration pin assembly includes;
• (i) a pin cradle supported upon said support bar assembly and shiftable therealong between said one and another locations and defining a slot oriented generally transverse to said support bar assembly;
• (ii) a registration pin received within said slot of said pin cradle and having a threaded bore;
• and
• (iii) a threaded jack screw threadably received within said threaded bore of said registration pin so that a terminal end thereof bears against said pin cradle, wherein turning movements applied to said jack screw responsively causes said registration pin to be raised or lowered relative to said pin cradle.