A method for depositing a metal on a surface is disclosed. The method comprises coating the surface with a sensitizing solution comprising at least a reducible salt of a non-noble metal to form a coated surface. The coated surface is exposed to a source of light radiation to form a catalytic layer capable of directly catalyzing the deposition of a metal thereon from an electroless metal deposition solution. The catalytic layer is treated with a fixing solution comprising an autocatalytic reducin...

A method for depositing a metal on a surface is disclosed. The method comprises treating the surface with a sensitizing solution comprising at least a reducible salt of a non-noble metal and a radiation-sensitive reducing agent for the salt to form a sensitized surface. The sensitized surface is exposed to a source of light radiation to reduce the metal salt to a reduced metal salt species. Either or both of the preceding sensitizing or radiation exposing steps is restricted to a selected patter...

A method of depositing a metal on a surface of a substrate is disclosed. The method comprises selectively treating the surface with a photopolymerizable composition, comprising an addition polymer containing a plurality of units of the formulae ##STR1## WHERE R and R.sub.1 are each a member taken from the group consisting of ##STR2## and pyrrolidone, R.sub.3 is an alkyl group of 1 to 18 carbons, R.sub.2 is a member selected from the group consisting of H and CH.sub.3 and x is a positive integer ...

An apparatus for depositing a continuous strand of material into a container includes a rotatable elbow-shaped tubular member having a substantially vertical portion and an angled portion. One end of a tubular sleeve is rotatably mounted on the angled portion of the elbow member, and the other end of the sleeve being free. The sleeve has an assymetric, substantially V-shaped slot which divergingly extends from an intermediate portion of the sleeve to the free end thereof. Means for rotating the ...

A charge forming and depositing machine part particularly for sticky semi-liquid material including a rocking valve having sharp edges disposed between a supply hopper and a charge-measuring expansible chamber, a charge receiving cylinder having a port communicating with the chamber and controlled by a delivery piston in the cylinder, and the delivery piston being arranged to clear a measured charge of sticky semi-liquid candy or the like mixture from the cylinder, to carry it beyond the end of ...

Apparatus for forming a uniform film on a planar surface of a planar support, particularly for forming thermoplastic films on conductive support members, comprises a drivable turntable having means for removably locating the planar support and having a distributor, mounted for rotation with it, a housing enclosing the turntable and the support, and a dispenser, located in the housing for delivering a charge of fluent material to the distributor. The distributor is arranged to distribute fluent m...

A charge forming and depositing machine particularly for sticky semi-liquid material including a rocking valve having sharp edges disposed between a supply hopper and a charge-measuring expansible chamber, a charge receiving cylinder having a port communicating with the chamber and controlled by a delivery piston in the cylinder, and the delivery piston being arranged to clear from the cylinder, to carry it beyond the end of the cylinder and into contact with a receiving surface, and such delive...

A method of depositing a metal on a dielectric surface is disclosed. The method comprises treating the surface with a stable hydrosol obtained by mixing and heating together in an acidic aqueous medium (1) a salt of a noble metal with (2) an organic compound containing at least two oxygen atoms selected from (a) an organic carbonate having a structural formula of ##STR1## where R = H, an alkyl radical, (b) ethylene glycol and (c) 1,3 dioxane. The treated surface is then exposed to a suitable ele...

A method of depositing a metal on a surface of a substrate is disclosed. The method comprises selectively coating portions of the surface with a colloidophobic material to render the portions colloidophobic and to delineate an exposed surface pattern which is capable of retaining a colloidal species thereon. The selectively coated surface is treated with a sol comprising a colloidal species selected from the group comprising (1) a species capable of reducing an activating metal ion to an activat...

A method for depositing a metal on a surface is disclosed. The method comprises coating the surface with a sensitizing solution comprising at least a reducible salt of a non-noble metal dissolved in a solvent comprising water and an alcohol having a total number of carbon atoms ranging from 2 to 8. The coated surface is treated to reduce the metal salt to metallic nuclei to form a catalytic layer thereon capable of directly catalyzing the deposition of a metal on said nuclei from an electroless ...