| 摘要 |
<p>A cutter device is associated with a heat source to assist in cutting dense materials. The heat source, comprising an electrical resistance may be fitted inside the cutter device, or it may be mounted within a hollow housing constructed with an opening to receive the cutter element. With the second arrangement, the cutter may be withdrawn from the housing when the blade is hot. Means for controlling the heating element in the housing are provided by a potentiometer device, according to the requirements of the material to be cut, working in conjunction with a visual light signal and an automatic 'pop-up' device.</p> |
