摘要 |
A cutter for flexible tubing supported on a mandrel having a peripheral groove at the location of the intended cut has an annulus (10) coaxially surrounding the mandrel and arranged for rotation thereabout. A blade carrier (16) is pivoted on the annulus (10) for supporting a cutting blade (17) moveable between withdrawn and cutting positions. The carrier (16) has an armature including a permanent magnet (19) which is arranged between a pair of electromagnets (22, 23) so that the armature will be held against either one of the electromagnets but may be moved to the other electromagnet by an appropriate pulse of electrical energy to the other electromagnet. |