Ryobi Limited

Yoshihiro Yasuhara

Masazumi Hidera

A leading edge side part,of a printing plate,can easily be inserted into a gap L,formed between a plate guide,positioned adjacent to positioning pins,and a leading edge side clamping base,because the gap L,is formed in a thickness slightly thicker than the printing plate,. Restoring force caused by flexure of the printing plate,allows the leading edge side part,thereof being inserted into the gap L,, the restoring force being generated when a tail edge side part,of the printing plate,is in contact with a contact member

Apparatus for positioning a printing plate to a plate cylinder of a printing machine

A spiral gear 7G formed on an adjusting bolt 7 is engaged with a spiral gear 8G disposed around a shaft 8 for diagonal adjustment. The shaft 8 is rotatably supported in a block 16 which is fixed to the bottom of the tail edge side clamping base 3, and the shaft 8 is screwed into the hole of a block 18 provided to a plate cylinder 60 and passes therethrough. The block 18 is supported so as not to be moved in the directions shown by the arrows 92, 93 relative to the cylinder plate 60. Diagonal image adjustment is carried out by moving the tail edge side clamping base 3 in the directions shown by the arrows 92 or 93 as a result of rotating an adjusting knob 7H of the adjusting bolt 7.

Diagonal image adjusting device in a plate cylinder

A leading edge side shaft 6, a tail edge side shaft 12 and a pulling shaft 14 are interlocked with one another through gears. The gears are rotated by using rotation of the plate cylinder. A leading edge side part 10a of the plate 10 is clamped with a leading edge side clamp 4 in accordance with the rotation of the leading edge side shaft 6. Thereafter, a tail edge side part 10b of the plate 10 disposed on the cylinder surface of the plate cylinder 60 is clamped with a tail edge side clamp 5. The plate 10 is pulled in a plate tensioning direction as a result of moving the tail edge side clamp 5 in the direction of the arrow 90 in accordance with the rotation of the pulling shaft 14.

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Fuchu, Japan

Yoshihiro Yasuhara