Guillotine cutter

A guillotine cutter comprising:

• a frame (1) having an elongated rectangular-shaped flat supporting surface (1a);
• a lower guillotine cutter blade (2) mounted on said supporting surface (1a) of said frame (1), said lower guillotine cutter blade (2) comprising a blade portion extending along one side of said supporting surface (1a) and an elongated flat plate portion connecting with said blade portion, a portion of a batch of paper (20) being placed on said plate portion;
• a guillotine cutter-blade holder (3);
• an upper guillotine cutter blade (4) mounted to said guillotine cutter-blade holder (3) and arranged oppositely to said lower guillotine cutter blade (2);
• guide means (15) mounted to said frame (1) for vertically guiding said guillotine cutter-blade holder (3) in such a manner that said guillotine cutter-blade holder (3) is movable at least between a cutting position at which said upper guillotine cutter blade (4) engages with said lower guillotine cutter blade (2) and a standby position at which said upper guillotine cutter blade (4) is upwardly spaced apart from said lower guillotine cutter blade (2);
• driving means (16 to 19, 22 to 26) for reciprocally moving said guillotine cutter-blade holder (3) in the vertical direction;
• at least one rod (6) mounted to said guillotine cutter-blade holder (3) at a position corresponding to said plate portion of said lower guillotine cutter blade (2) for vertical slide movement;
• a pressing plate (5) arranged oppositely to said plate portion of said lower guillotine cutter blade (2) and secured to the lower end of said rod (6) which is downwardly protruded from said guillotine cutter-blade holder (3);
• a flat head (6a) provided at the upper end of said rod (6) which is upwardly protruded from said guillotine cutter-blade holder (3);
• and
• a spring (7) fitted around said rod (6) between said guillotine cutter-blade holder (3) and said pressing plate (5) for downwardly elastically biasing said rod (6) to keep said head (6a) abutted against said guillotine cutter-blade holder (3),
• during downward movement of said guillotine cutter-blade holder (3) from said standby position toward said cutting position, said pressing plate (5) being brought into abutment with the batch of paper (20) placed on the plate portion of said lower guillotine cutter blade (2), thereafter, said guillotine cutter-blade holder (3) being further downwardly moved, so that said batch of paper (20) is cut by said lower and upper guillotine cutter blades (2 and 4) and the head (6a) of said rod (6) upwardly protrudes from said guillotine cutter-blade holder (3) against the elastic biasing force of said spring (7);
• a sensor (8) for detecting the distance from said head (6a), said sensor (8) being mounted to said guillotine cutter-blade holder (3) and arranged oppositely to said head (6a);
• and
• a thickness measuring element (27) for measuring the thickness of said batch of paper (20) on the basis of detection signals from said sensor (8).