(under subclass 290) Device wherein the tool couple element is mounted so that it may be moved from a position beneath the work bearing surface of the support, where it is ineffective to take part in treatment of the work, to a position coextensive with or above and surface where it is effective to participate in said treatment.
(1) Note. Where the relative movement of the support and element is disclosed as taking place during the treatment of the work, the patent will be found in the class of the treating device, and in this class.
