Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1992-09-23
1994-09-20
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156196, 1562751, 264545, 141 8, 141113, 141323, 222420, 422100, 7386332, 7386411, 7386415, B29C 5100, B29D 2200, B01L 302, B65D 4718
Patent
active
053486064
ABSTRACT:
A method of making a pipette sampler system for removing and transferring a plurality of liquid samples includes the step of thermoforming a plurality of identical pipettes in a first thin PVC plastic sheet utilizing a first precision die. A concave housing including a plurality of stiffening depressions and a skirt portion possessing a peripheral sealing edge is thermoformed from a second thin PVC plastic sheet utilizing a second die. The housing and pipette sheet are joined by dielectric heat sealing forming a manifold communicating with each pipette, with the peripheral sealing edge and each of the stiffening depressions heat welded to the pipette sheet, forming an inflexible rigid monocoque structure. A filling tray is thermoformed from a third thin PVC plastic sheet utilizing a third die. A sealing washer is sealed to a top surface of the housing, surrounding an aperture formed through a top surface of the housing and communicating with the manifold. The sealing washer provides a sealing surface for attachment of an actuator which selectively provides a vacuum in the manifold to draw liquid into the pipettes from the filling tray.
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Hanaway Richard W.
Hrudicka James
Ball Michael W.
Kearns Jerry T.
Lorin Francis J.
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