A hydroelectrometallurgy method comprising suspending particles of a crude metal or metal sulfide in the anode zone and seed particles of pure metal in the cathode zone, causing such particles to collide with the surfaces of the anode and cathode, respectively, and thereby effecting the corresponding electrochemical reaction on each of the particles, whereby metal ions are formed in the anode zone and the seed particles grow into coarse particles in the cathode zone as the result of precipitatio...

Elastomeric sealant compositions are heated and extruded as a tape. The extruded tape is applied hot to a structural joint to be sealed. Application is thus much easier than with a cold tape and bonding to substrates is greatly enhanced. Furthermore, tape which would otherwise be too stiff can be installed in this manner while providing outstanding yield strength and resistance to creep. In preferred embodiments of the invention, the tape is extruded continuously and is simultaneously applied to...

Method of knitting garments by hand is carried out by casting-on the desired number of stitches on one neelde, and thereafter forming the successive rows by knitting through each stitch twice before removing it from the needle, whereby the successive stitches are drawn closely together and the loops formed by each stitch are transverse the plane of the work. A dense, shape-retaining knitted texture is obtained.

Exhausted ion exchange resin particles of the hydrogen-form, cationic type are regenerated in a countercurrent process with sulfuric acid, while preventing the formation of calcium sulfate precipitate. Exhausted resin is introduced into the column at the top, and material is simultaneously withdrawn from a lower portion. The volume in the column is maintained constant by introducing a non-precipitating liquid such as water. Preferably, the non-precipitating liquid is introduced through the same ...

A sewing apparatus and method for securing a fastener between opposed fabric edge portions which automatically transfers and guides the fabric and fastener, as a unit, relative to a relatively stationary sewing machine and needle to form a predetermined generally linear stitching line pattern for securement to the fastener, and in which each edge portion is held in folded and tensioned condition, and in spaced-upon relation to itself during selective portions of the operation to effect precise, ...

A method of galvanizing batches of articles wherein the articles are placed in a perforate basket which is suspended from a rail above a workpath. The thusly suspended articles are first dunked in pickling, rinsing and fluxing solutions and then into a zinc bath where the basket and articles are spun to remove flux. The basket is then removed from the bath, moved directly to a position over a quench tank and again spun so that spelter falls into the tank for removal as shot. The basket and artic...

This invention relates to a soft solder containing a significant portion of silver. This solder is particularly useful in soldering together components fabricated from aluminum or aluminum based metals to components based upon more noble metals and particularly to copper or copper base alloys such as ordinary brass.

Hermetically sealed package for photographic sheet materials provided with one or two tearstrips which extend at the end of the package in the form of a loop. In order to facilitate the opening of the package in the dark a small part of the package is scored in the corners where the tearstrip extends, so that it can easily be torn off whereupon a sufficiently long extremity of the tearstrip is freed to open the package without difficulty.

A method of knitting a sleeved garment in which sleeve tubes and a body tube are knitted and joined to one another on the knitting machine, said joining being brought about by means of sleeve extensions knitted integrally with the sleeve and during the knitting of which needles are taken out of action whilst still holding their loops and are subsequently reintroduced to cause portions of wales of the sleeve extensions to lie at an angle to other portions of those extensions.

A culturing method and article according to which one part of a wick is placed in engagement with a body fluid in order to check for the presence of suspected micro-organisms. An opposed part of the wick is maintained out of engagement with the body fluid, so that by capillary action the body fluid will progress along the wick from the one part toward the opposed part thereof. The progress of the body fluid from the one part toward the opposed part of the wick is limited to achieve a density gra...