Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With bending – folding – winding – or wrapping means
Patent
1974-11-29
1977-07-12
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With bending, folding, winding, or wrapping means
144256, 144281C, 156196, 156380, 156580, B23K 2700
Patent
active
040352234
ABSTRACT:
Tread plates on mutually opposed endless belts clamp and move a pack of boards horizontally lengthwise between electrodes for setting adhesive between the boards by dielectric heating. The tread plates are engaged by backing members spaced transversely of the length of the belt, and the tread plates are connected by a chain located between the backing members. The portions of the tread plates engageable with a surface of the board pack are of a suitable plastic to deter passage of radio-frequency energy from an electrode to an electrically grounded portion of a tread plate or to the chain. Air bags are inflatable to press at least one endless belt against the board pack or to move such belt relative to supporting means away from the board pack. Adjusting means for prepressing rollers ahead of the endless tread belts on one side of the board pack and adjusting means for the endless tread belt on the same side of the board pack are interconnected for synchronized adjustment. A plurality of pivoted pressure rollers spaced lengthwise of the path of movement of the board pack ahead of the endless belts for engaging the board edges are connected by chains to synchronize them for conjoint movement toward and away from the sides of the board pack. Also, the endless belts can be curved to bend the pack of boards lengthwise. The curvature of the belts can be adjusted by mounting belt-supporting means on a plurality of jacks spaced lengthwise of the belts and connected by chain-and-sprocket speed reducer means for simultaneously adjusting the effective lengths of the various jacks in different related degrees.
REFERENCES:
patent: 2071999 (1937-02-01), Dike
patent: 2135763 (1938-11-01), Nicholson
patent: 2662564 (1953-12-01), Payzant
Beach Robert W.
Simmons David A.
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