Coating apparatus – With heat exchange – drying – or non-coating gas or vapor... – Cooling
Patent
1980-10-02
1983-10-11
Smith, John D.
Coating apparatus
With heat exchange, drying, or non-coating gas or vapor...
Cooling
118 74, 118425, 118503, 134 68, 134134, 198413, 271225, 271185, 228 47, 228180R, 228259, B05C 309, B23K 3102
Patent
active
044085605
ABSTRACT:
Printed circuit boards which are to be tin-plated pass through a liquid application station in a horizontal direction, and thereafter through an activation station for the activation of the applied liquid. Then the printed circuit boards arrive at a receiver element of substantially U-shaped cross-sectional configuration, which subsequently is pivoted about a horizontal pivot shaft, out of a horizontal take-up position into a vertical transfer position. During this pivotal movement the printed circuit board bears upon a support element or part which supports the printed circuit board. By means of grippers the printed circuit board, previously brought by the receiver element into a vertical position, is immersed in vertical position into a solder bath. After a certain residence time the printed circuit board is inserted by the gripper into a further receiver element likewise having a U-shaped cross-sectional configuration, this receiver element being located in a vertical receiving position. Then, this further receiver element is pivoted about a horizontal pivot axis into a horizontal transfer position where the printed circuit board is placed upon an outfeed conveyor which transfers such printed circuit board to a sieve transport belt which moves the printed circuit board through a cooling station. During pivoting of the further receiver element, from the vertical into the horizontal position, the printed circuit board bears upon a support element which continuously supports the printed circuit board during its transport. The printed circuit board which softens within the solder bath, due to this supporting action of the support element, is prevented from deforming during such time as it is transferred from the vertical into the horizontal position.
REFERENCES:
patent: 1164277 (1915-12-01), Forsstrom
patent: 2347608 (1944-04-01), Owen
patent: 2803216 (1957-08-01), Termini et al.
patent: 3056371 (1962-10-01), Frank
patent: 3273572 (1966-09-01), Schwarze et al.
patent: 3680762 (1972-08-01), Kondo
patent: 4232066 (1980-11-01), Stevens et al.
Kleeman Werner W.
Plantz Bernard F.
Sinter Limited
Smith John D.
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