摘要:
Free-flowing chloropolyethylene in powder form which keeps this property after prolonged storage and has good processing properties is impregnated substantially on the particle surface with definite amounts of fine-grained vinyl chloride polymer and fine-grained organic substance in a definite proportion. The invention also relates to a process for the manufacture of such an improved chloropolyethylene and the use thereof.
摘要:
Apparatus for feeding a plurality of yarn, sliver or fibrous materials to a textile machine, comprising: a plurality of stationary supply packages on which said materials are wound; a stationary endless track having at least a working and a return section; and a plurality of feeding elements. Every feeding element is associated with one of said supply packages, wherein said feeding elements are arranged to run around said track in series in such a manner, that the distances between the feeding elements and the associated ones of said supply packages become gradually and alternately smaller and larger during successive runs of said feeding elements on said track. Said materials are held by said feeding elements when the relevant feeding elements pass through said return section, and are releasable for processing by said textile machine when the relevant feeding elements pass through said working section. A plurality of automatically operating and stationary storage devices are arranged in the path between the said feeding elements and the associated supply packages for the intermediate storage of all quantities of the materials which may result from a reduction of the distance between a feeding element and the associated supply package, and for the delivery of said stored quantities, if said distances again become gradually larger.
摘要:
Apparatus for feeding yarn, sliver or fibrous materials wound on stationary supply packages to a texile machine, comprising a plurality of movable material transporting elements and a plurality of movable material laying-in elements for feeding the materials from the supply packages to the textile machine, endless tracks defining working and return sections for said transporting elements and working and return regions for said laying-in elements, said transporting elements and said laying-in elements running in series on said endless tracks, and entwining of the materials during successive runs of said elements on said tracks is avoided by at least one deflection element by means of which the materials are fed via said transporting elements to said laying-in elements, during successive runs thereof through the working region, alternately from one and another side of a surface laid through the working region of said laying-in elements and the return section of said transporting elements.
摘要:
An apparatus for feeding yarn, or the like vice yarn guides which travel on an endless O-shaped floating-mounted track to present the yarn, or the like to the instrumentalities of a textile machine.
摘要:
Aqueous plastic molding compositions based on ceramic raw materials characterized by containing a dual binder system consisting of water-soluble and/or water-dispersed air-drying high molecular weight film-forming agents, as well as of water-insoluble thermoplasts of fine particle form sinterable at temperatures below 250.degree. C. and a method of producing molded articles using the said compositions are disclosed.
摘要:
Novel phosphonocarboxylic acid compounds having the formula ##STR1## wherein the radicals R which may be identical or different and which represent alkyl radicals with 1-18 carbon atoms which may be optionally substituted by halogen, hydrogen, alkali metal ions or ammonium ions, are prepared by reacting methylene phosphonic acid alkyl esters with acrylic acid esters in the presence of strongly basic catalysts at temperatures of about 0.degree.-140.degree. C., and by possibly transesterifying the reaction products or by submitting the latter to acid or basic hydrolysis. The acid hydrolysis to yield the free, 3,3-diphosphono-pimelic acid is best carried out with at least the about 6-fold molar quantity of a carboxylic acid such as HCOOH, CH.sub.3 COOH, etc., optionally in the presence of catalytic quantities of strong acids or bases, at elevated temperatures.The compounds of formula (I), wherein the radicals R represent only alkyl radicals which may possibly be substituted by halogen, are valuable plasticizers for polyvinyl chloride, the compounds of formula (I), wherein R=H, alkali metal ions and/or ammonium ions, are valuable gypsum setting retardants and complex-forming agents for metal ions.
摘要:
A rocker arm 5 is pivotably mounted in a needle shank 15 and biased towardsn open position of the needle hook 6 by a spring 17. Upstanding feet 10, 12 on respective lever arms 13, 14 of the rocker arm implement the positive and accurately controlled opening and closing of the needle hook by lock elements 9, 11 slidable along the needle bed.
摘要:
A knitting machine having reciprocable knitting tools and a cam operated means for reciprocating said knitting tools in which said cam operated means provides an amount of play in the movement of the knitting tools and means for moving said knitting tools an additional distance within the play permitted by said cam operated means.
摘要:
The invention relates to an apparatus for the automatic production of a punch having a sharp cutting edge, especially for label cutting apparatus, made from a punch body provided with an upstanding land. To avoid the former manual finishing of the land produced by etching or by some other manner, a largely automatically operating apparatus is proposed which has a table (6) for the punch body, a tool (56) with a roof-shaped notch facing the table (6), a first drive (64) for the automatic movement of the tool (56) back and forth in the direction of the table (6) and additional drive (15, 37, 51, 62) for the production of relative movements between the table (6) and the tool (56), by means of which the tool (56) can be guided automatically along the land (22) (FIG. 1).
摘要:
Zig-zag folded layers of paper webs are stacked downstream of a folder on a lifting table. A belt is raised to hold a nearly completed stack from below and a separating rake with leading spear shaped heads is moved into the stack at a division between sheets, and severs the stack along a fold. The lifting table and separating rake are shifted together as the separating rake advances, during which the stack to be removed is supported on the raised belt. A new partial stack accumulates on the separating rake while the old stack is removed, the belt is lowered and the table is raised. The table and rake are then returned to their original position to resume stacking on the table. Shifting of the table and separating means, and movement of the raised belt, are driven from a common drive by means of a controllable freewheel clutch engaging over a part of the cycle.