B - Operations – Transporting – 26 – D
Patent
B - Operations, Transporting
26
D
164/25, 164/48
B26D 3/16 (2006.01) B26F 1/00 (2006.01) B26F 1/24 (2006.01) B26F 1/26 (2006.01) B65H 75/50 (2006.01)
Patent
CA 1203157
METHOD AND APPARATUS FOR PERFORATING AND/OR SEVERING TUBULAR BODIES ABSTRACT OF THE DISCLOSURE Tubular workpieces are formed with perforations of desired size and/or shape by repeatedly piercing selected portions of the workpieces by needles, pins or analogous piercing tools. The tools can be stationary while the workpieces roll therealong, or the workpieces can rotate while coming into repeated engagement with one or more sets of orbiting tools. The frequency and the number of penetrations of tools into selected portions of the workpieces are selected with a view to heat the tools as a result of frictional engagement with the material of the workpieces, i.e., as a result of repeated penetration into and extraction from selected portions of a rotating or rotating and rolling and/or axially moving workpiece. This enhances the making of predictable perforations in tubular workpieces, especially workpieces which consist of a synthetic thermoplastic material, such as bobbins for the storage of textile yarns. One or more knives can be provided to subdivide each discrete workpiece or a continuous tubular body into discrete sections of desired length. The piercing tools can be used to make perforations in addition to the severing action of the knife or knives, or to merely rotate and/or axially move the tubular workpiece preparatory to, during and/or subsequent to severing. Alternatively, the piercing tools can be used to make slits or circumferentially complete cuts in tubular workpieces if the selected portions of the workpieces are contiguous, as considered in the circumferential and/or axial direction of the workpieces. Ejectors can be provided to expel successive discrete tubular workpieces from the perforating station, e.g., simultaneously with movement of one or more sets of piercing tools away from the workpiece.
425128
Engel Adalbert
Engel Christoph
Engel Uta-Maria
Engel Adalbert
Fetherstonhaugh & Co.
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