This invention relates to rigid closed-celled polyisocyanate-based foams exhibiting improved dimensional stability and a process for their preparation. In particular, it relates to resulting foams containing within their cells, a gas mixture comprising from 15 to 70 mole percent carbon dioxide and from 30 to 85 mole percent of a halocarbon mixture. The halocarbon mixture itself, comprises (a) from...

This invention relates to a process for preparing a rigid, closed-celled polyisocyanate-based foam in the presence of water and a blowing agent. The blowing agent comprises one or more organic compounds, particularly halocarbons, having a boiling point of from 222K to 272K at atmospheric pressure, and is substantially free of organic compounds having a boiling point of 273K or greater. Preferred h...

This invention relates to rigid closed-celled polyisocyanate-based foams exhibiting improved dimensional stability and a process for their preparation. In particular, it relates to resulting foams containing within their cells, a gas mixture comprising from 15 to 70 mole percent carbon dioxide and from 30 to 85 mole percent of a halocarbon mixture. The halocarbon mixture itself, comprises (a) from...

2054692 9013396 PCTABS00002 A tool holding jig for a grinding machine has a tool holder (29) mounted on a parallelogram linkage having lower swivel rods (19) inclined slightly so that, as the tool holder (29) is rocked to and for across the face (31) of a grinding wheel by a reciprocating drive arm (53), the grinding pressure is greatest at the centre of the rocking motion.

METHOD AND COMPOSITION FOR TREATING WASTE WATER A process of treating water to remove metal ion contaminants contained therein, said metal ion contaminants selected from the group consisting of metals in Groups 8, lb, 2b, 4a, 5a, or 6a of the periodic table, lanthanide metals, and actinide metals including transuranic element metals, by adjusting the pH of a metal ion contaminantcontaining water s...

A process for colouring building materials A process is disclosed for colouring building materials with inorganic pigments in the form of microgranulates. The granulates comprise one or more pigments and one or more compounds selected from boron, aluminum, silicon, titanium, zinc and tim. LeA 26 915

A thermal transfer recording system using a thermal head is disclosed. The thermal head includes protective films (19, 20) with different levels of thermal conductivity so that heat can be selectively and preferentially conducted to the protective film (19) located right above the heat resistor layer (16), resulting in improved thermal efficiency and reduced power consumption. Because the thermal ...

A process and apparatus for spheridizing irregularly shaped minute particles, and the spheres produced thereby, in which a thin carbonaceous coating is applied to the particles in a unique manner, and in a preferred embodiment the particles are then advanced through successive fluidizing beds. The first bed has an inert atmosphere and is maintained at an elevated temperature sufficiently high to a...

The circuit is formed including (a) depositing a fritless paste having a metal component of primarily Cu with 1-25(1-10) wt.% Ag on a substrate; (b) heating in an oxidising atmos. at less than 1100 deg.C. to bond the metal component to the substrate; (c) forming a resistor material layer on the substrate and portions of the metal; (d) heating in an oxidising atmos. to establish a desired sheet res...

A microporous zirconia whose characteristic is that it has pores with a mean diameter of less than 2 nm. The invention also relates to a process for its preparation, characterised in that it consists in performing a thermohydrolysis of a zirconium salt, separating off the precipitate obtained and calcining it and in that it consists in using at least one anion which is more covalent than the hydro...

A microporous zirconia whose characteristic is that it has pores with a mean diameter of less than 2 nm. The invention also relates to a process for its preparation, characterised in that it consists in performing a thermohydrolysis of a zirconium salt, separating off the precipitate obtained and calcining it and in that it consists in using at least one anion which is more covalent than the hydro...

A litter bin comprises a cylindrical body (1) with a bottom and with an elbow-shaped cover (2) having a front opening (3) for inserting paper, in which there is a small plate (4, 5), for putting out cigarettes, fastened to the bottom edge thereof. The cylindrical body (1) and the cover (2) are pivotally joined to respective ends of a vertical support (11) fastened in turn to a post, column or lamp...

Equipment (E) for reforming edges of flat laminated plastic panels consists of a large chamber, pref. with a square section and heat conducting walls in which long heating elements are located. On the outside of the chamber, three of the walls have heat insulating layers on the two side walls an outer protective coating is heating surface on which the laminate to be reshaped is placed. The wall op...

The razor, particularly for professional use in hairdressing establishments, comprises a support (2) in which the blade (3) is mounted with its cutting edge protected by a safety seal (5) which has to be broken off along the line (6) before the blade can be used. The blade (3) can either be housed within the support during moulding of the support (2), or else, a housing area can be formed in the...

This invention relates to a catheter-cum-balloon characterized in that the balloon is reinforced with composite yarns composed of elastic yarns and non-elastic ones which are each larger than the elastic one in free length. In the catheter-cum-balloon of the present invention, expandability of the balloon is high and thus, when inserted into or pulled out from the blood vessel for the purpose of t...

Installation comprises a rotary knob, the rotation movement of which is transmitted onto a rotating disk. The disk is positioned round the knob and before the orifice, and the transmission is effected by a gear unit located behind the orifice. The gear unit receives the rotation movement of the knob and extends through the orifice non-centrally. USE/ADVANTAGE - Installation for displaying the prog...

A first array of laser diode devices are optically coupled by a diffraction grating comprising a plurality of spaced diffraction nodules in a grid array optically coupled to the devices. The light emitted from a device of the first array can pass through the grid array to a second device, reflect back to the emitting device in a Distributed Bragg Reflector (DBR) mode and deflect orthogonal to the ...

A multiprocessor type time varying image encoding system having a plurality of digital signal processor (DSP) modules (DMM's) connected in parallel, each DMM having a DSP, a local memory and an interrupt control unit, a plural- ity of common memories for storing data which is being processed, parameters, etc., an input frame memory which enables reading and writing operations to be executed asyn-...

The heat sensing device is in a channel which is responsive to longer wavelengths of the electromagnetic spectrum in, say, the far infrared region. The other channel responds in shorter wavelengths in the near infrared, say, in a range of 0.7 to 1.2 microns, defined by a filter. The heat sensing device may be a thermopile and receives radiation in the range from seven to thirt microns through a fi...

Procédé et dispositif de transmission de l'information entre émetteurs-récepteurs radioélectriques d'un même réseau fonctionnant en évasion de fréquence Le procédé consiste: - à rechercher (2) au moyen d'au moins un poste émetteur-récepteur un plan de fréquences exploitables - à transmettre (3) le plan de fréquences exploitables aux autres émetteurs-récepteurs du réseau - et à effectuer (4) les tr...