Automatic plate supplying device for use in an offset printing machine

An automatic plate supplying device for suplying plates sequentially to an offset printing machine including a pair of side walls, a drive motor disposed at one of the side walls and a plate conveying means driven by said motor, comprising:

• (a) a plate storing means for supporting the plates in a stack having a bottom plate, said plate storing means being formed with a normally substantially closed opening through which the plates are to be drawn sequentially,
• (b) a swingable suction means for sucking the bottom plate and transporting it to said conveying means, said swingable suction means comprising a pivotable member having a pivoting end and a swinging end, a swingable suction pipe in communication with a negative pressure source and mounted on the swinging end of said pivotable member, and a plurality of suction feet supported by said suction pipe in fluid communication therewith, said suction pipe and suction feet being rotatable with respect to said pivotable member,
• (c) means for actuating said suction means to swing it between said plate storing means and said plate conveying means, and
• (d) cam means driven by said driving motor for operating said swingable suction means and said means for actuating said suction means.