Apparatus with a shunt system for processing printed circuit board substrates
OwnerDon S. Penderinventor
Life of this patent
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Abstract
Apparatus for contacting a circuit board substrate with etching fluid or some other chemical includes a conveyor system comprised of upper and lower rotating disks for receiving and transporting the circuit board substrate while the substrate is contacted with fluid. The apparatus includes a labyrinth seal which is used to prevent fluid from escaping from the apparatus. A shunting system permits the type of fluid applied to the substrate to be readily altered. Housing units incorporated in the apparatus are readily secured together with a resilient clamp.
Claims1
Apparatus for contacting with a fluid a substrate traveling through said apparatus, said apparatus including
- (a) a conveyor table for transporting said substrate;
- (b) means for contacting said substrate with a fluid including a shunt system comprising
- (i) a primary fluid input conduit,
- (ii) first and second spaced apart inlet ports formed in said primary conduit,
- (iii) a pair of secondary conduits for inputting fluids into said primary conduit and each connected to a different one of said inlet ports,
- (iv) piston means in said primary conduit to sealingly slidably engage said primary conduit and divide said primary conduit into a pair of discreet fluid chambers such that fluid in one of said discreet chambers is prevented from intermixing with fluid in the other of said discreet chambers
- (v) at least one outlet port formed in said primary conduit generally intermediate said inlet ports,
- (vi) a hollow conduit attached to said outlet port for dispensing fluid onto said substrate,
- (vii) means for moving said piston means from a first operative position intermediate said outlet port and said first inlet port to a second operative position intermediate said outlet port and said second inlet port.
Dependencies are inferred from the claim text.