(under subclass 25) Device, whose applicator is moved to and fro along a generally straight or curved path with fusion occurring during both a forward and return stroke of the applicator.
(1) Note. Also included is a patent disclosing an applicator progressing along a seam to be formed by increments while in a continuous to-and-fro motion.
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32, for means to reciprocate an applicator with fusion occurring only during the forward or return stroke, but not both.