APPARATUS FOR VIBRATION WELDING OF SHEET MATERIALS

摘要

1422800 Laminates CROMPTON & KNOWLES CORP 12 Dec 1972 [13 Dec 1971] 26861/75 Divided out of 1422798 Heading B5N A laminated material comprises a plurality of sheets of textile fibrous material in superimposed fashion at least one of which comprises thermoplastic material, a plurality of spaced localized areas arranged in predetermined patterns in which the layers are fusion bonded and mechanically interlocked to each other by ultrasonic vibration and unbonded areas of the layers surrounding the spaced bonded areas where the textile fibrous material is substantially unaffected by the ultrasonic vibration. Apparatus suitable for joining two or more of the sheet materials 23, 24 comprises means to advance the sheet materials to be joined from a source of supply in superimposed condition, a plurality of spaced ultrasonic vibration transmitting members 16 each having a working surface 30 arranged to contact one side of the sheet materials, each member being offset from adjacent members in the longitudinal direction of the sheet material and being arranged so that every point across the width of one of the sheet materials comes into contact with at least one of the working surfaces and anvil means 18 located on the other side of the sheet materials comprising spaced projections 21 having opposing surfaces 22 for co-operating with the working surfaces to produce welds in portions of the sheet materials located between the working surfaces and opposing surfaces. Projections 21 may be arranged in a pattern to create a decorative welding pattern. Additional sheet materials, e.g. a fluffy non-woven batt, may be introduced between sheet materials 23 and 24 to produce, for example, a quilted product. Rotatably mounted roll 18 may be replaced by a conveyer having projections for cooperating with the working surfaces of the vibration transmitting members.