| 摘要 |
<p>931,881. Electric heating elements. BRITISH INDUSTRIAL PLASTICS Ltd. Oct. 5, 1960 [Oct. 15, 1959], No. 34092/60. Class 39 (3). [Also in Group V] An electric heating element for an injectionmoulding machine (see Group V) comprises a tubular metal sheathing 25, housing a helicallycoiled resistance wire 26, and having an insulating filling 27 of a ceramic material or asbestos wool. The metal sheath may be used as the electric return.</p> |
