Abstract:
Applying photoresist to silicon wafers in the manufacture of integrated circuit chips by carrying the wafers upon a rotor in a chamber and spraying from a plurality of nozzles in the chamber toward the rotor for application to the wafers.
Abstract:
Excess coating material removed from a coated web 1 by an air doctor 6 and entrained in the exciting gas mixture flow 8 is directed along a plate 9 to effect primary coating material separation and recovery in a chamber 11, whereafter the flow passes along an inwardly spiraling apparatus wall 14 which terminates in an air exhaust duct 16. The wall 14 initially continues the prolongation or extension plane of the plate 9, and includes secondary recovery chambers 13 and 15, whereby separation is implemented by both centrifugal and gravitational forces. The same concepts may also be used to recover solid particles in a surface abrasion apparatus such as a sand blaster.
Abstract:
Method and means for continuously contact-coating one side only of a ferrous base metal strip with a molten coating metal. One or more roll means are provided to conduct the strip surface to be coated above the surface of a bath of the molten coating metal. The strip surface to be coated is caused to travel sufficiently close to the molten coating metal bath surface that the surface tension and wetting characteristics of the coating metal will permit the formation of a meniscus which will continuously contact and coat the strip surface. The coating is subjected to jet finishing. The strip is maintained in a protective non-oxidizing atmosphere at least until the one side thereof is coated. The strip may be maintained in the protective non-oxidizing atmosphere until it is sufficiently cooled to prevent the formation of a visible oxide on the uncoated side thereof. When the strip is exposed to an oxidizing atmosphere after coating and while still sufficiently hot to form a visible oxide coating on the uncoated side thereof, the strip will thereafter be subjected to acid cleaning, rinsing and drying operations.
Abstract:
An air knife having at least one lip which is slidable relative to its body via a plurality of cam plugs which are interposed between the slidable lip and the body member to adjustably extend and locate the lip tip relative to the other lip tip periodically as the lips become worn and the gap between them increases. The adjustable lip is secured to the body member by a plurality of cap screws which alternate with the cam plugs across the width of the air knife.
Abstract:
A dewebbing unit and dip tank used in the treatment of tire cord fabric with a liquid coating containing an agent for increasing the bond between the cords of the fabric and rubber material used in the production of tires. The dip tank has a pair of weirs which the liquid coating is caused to overflow for contact with the tire cord fabric which is directed across the weirs. The dewebbing unit includes a chamber in which fluid, under pressure, is alternately passed through the fabric from opposing sides of the fabric to simultaneously vibrate the fabric and pass air through the pores of the fabric.
Abstract:
Continuous metallic strip hot dip metal coating apparatus in which streams of gas under pressure are impinged against opposite faces of a continuous metallic strip emerging from a molten coating metal bath to thereby control the final coating weight on the strip, there being provided means for giving an indication corresponding to the final coating weight on the metal strip in combination with means responsive to such indication for controlling the impingement effect of the streams of gas under pressure to thereby obtain a desired final coating weight on the metal strip.
Abstract:
Apparatus and method in which streams of gas under pressure are impinged against opposite faces of a continuous metallic strip emerging from a molten coating metal bath to thereby control the final coating weight on the strip, there being close control of the temperature of the molten coating metal in the bath by means of cooling fluid in heat exchange relation with a portion of the molten coating metal in the bath.
Abstract:
In a coating apparatus, the web is conveyed and supported on a rotating roll. Liquid coating material is applied by atomizing the material with air to create a mist adjacent to and contiguous with the supported web. A thin line of pressurized air from the discharge orifice of an air knife is directed toward the web on an angle against the direction of web travel and into a confined space away from the orifice to create a turbulent zone adjacent the web. Liquid coating material is metered under pressure into the turbulent zone through a slot of a chamber. The coating on the web is leveled by the same air stream in a second zone closely adjacent the air orifice.
Abstract:
A machine for coating a food product with breading material has an elevated hopper for storing the breading material and means for feeding the same in a smooth and controlled manner from the hopper, through a free-flowing downspout to be deposited on a belt beneath the food product, together with means for feeding the breading material in a smooth and controlled manner from the hopper to be deposited on top of the food product with a control valve at such outlet to control the rate of feed. A hooded portion of open mesh belt conveyor is provided near the discharge end of the machine with air spray pipes above the belt to remove excess material, and the hood is adapted to be raised without interrupting the operation of the machine. In a modification, a flip bar is provided across the conveyor belt toward the discharge end of the machine to flip over the product so as to shake out breading material lodging in cavities of the food product, together with a novel arrangement for taking up excess length of the belt after it passes over the raised flip bar.
Abstract:
Apparatus for automatically positioning articles, as silicon semiconductor wafers, on rotary spin assembly mechanisms and indexing transporting means and a means for holding said wafer thereon combined with a means for dispensing a predetermined amount of photoresist solution on said wafers and spinning a uniform film of solution on the wafers and spin air drying through a sequence of rotating indexing steps followed by automatic transfer to and through drying means and a means for unloading therefrom and transporting the wafers to a receiver holder for further processing and transportation.