Patent ID: 6709376
Filing Date: 2004-03-23
Classification: B65H

Abstract:
A jaw cylinder in a jaw folder, comprising:a first base including a stationary member in a jaw mechanism, said stationary member having a jaw portion; a second base including a swing member, said swing member having a jaw portion accessible to said jaw portion of said stationary member; and a third base having end axes at both ends, said third base rotatably supported by said end axes on a pair of opposite frames, said first base and said second base rotatably located on said third base about the rotational centerline of said third base, said first, second and third bases synchronously rotating to move said swing member close to and apart from said stationary member to grip a print therebetween, said jaw cylinder further comprising: a jaw clearance adjusting mechanism for turning said first and second bases about the rotational centerline of said third base in opposite directions to adjust a gap between said jaw portion of said stationary member and said jaw portion of said swing member in said jaw mechanism; a first force exerting mechanism for always exerting a force on said first base in the direction parallel with the tangent to a rotational trail of said first base; and a second force exerting mechanism for always exerting a force on said second base in the direction parallel with the tangent to a rotational trail of said second base.