公开(公告)号：US4510841A

公开(公告)日：1985-04-16

申请号：US560083

申请日：1983-12-09

申请人： John Farran ,  Michael R. Hatchett ,  John S. Heath

发明人： John Farran ,  Michael R. Hatchett ,  John S. Heath

IPC分类号： B26D1/30 ,  B26D5/22 ,  B26D7/14 ,  B26D7/26

CPC分类号： B26D5/22 ,  B26D1/305 ,  B26D7/14 ,  B26D7/26 ,  Y10T83/343 ,  Y10T83/8776 ,  Y10T83/8779 ,  Y10T83/9447

摘要： A paper shear mechanism consists of a guillotine having a fixed blade and a pivoted blade. The cutting edge of the fixed blade is concavely curved so that paper to be cut as fed between the blades assumes a corresponding curvature and is given some longitudinal rigidity during the cutting operation. The pivoted blade is of composite structure to simplify the manufacturing process and thus reduce cost. Essentially, it includes a cutting section stamped from flexible sheet steel shim to provide a cutting edge with the desired nip angle. The flexible steel section is spot welded to a mild steel backing member with an elongated spring member sandwiched between the two. The spring member has a number of spring teeth which exert a force along the length of the flexible section to deflect its cutting edge laterally towards the fixed blade. By this means contact between the cutting edges is maintained along the length of a cut and relief between the facing surfaces of the two blades is provided. A sheet feeding apparatus with a correspondingly curved cross-section to the fixed blade feeds paper web to the shear mechanism. A single motor serves to feed paper during forward rotation and to operate the paper shear during reverse rotation.

摘要翻译： 纸剪切机构由具有固定刀片和枢轴刀片的闸刀组成。 固定刀片的切割边缘是凹形弯曲的，使得在切割刀片之间被切割的纸张呈现相应的曲率并且在切割操作期间具有一定的纵向刚度。 枢转叶片是复合结构，简化制造过程，从而降低成本。 本质上，它包括一个从柔性钢板垫片冲压的切割部分，以提供具有所需夹角的切削刃。 柔性钢部分点焊到低碳钢背衬构件上，其中夹在两者之间的细长弹簧构件。 弹簧构件具有多个弹簧齿，其沿着柔性部分的长度施加力以使其切割边缘横向朝向固定刀片偏转。 通过这种方式，切割刃之间的接触沿切割长度保持，并且提供两个刀片的相对表面之间的释放。 具有与固定刀片相对应的弯曲横截面的片材进给装置将纸幅馈送到剪切机构。 单个电机用于在正转期间送纸，并在反向旋转期间操作纸张剪切。