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powder paint inlets of the body, a fluidity improver inlet of the body, an outlet of the body, a transpor- tation path formed in the body to communicate each of the inlets with the outlet, and a rotary ele- ment having a blade in the trans- portation path comprising sepa- rately introducing plural kinds of powder paints of different hues and a fluidity improver, which possesses a charge control func- tion, into the body by pressurized air; mixing the plural kinds of the powder paints and the fluidity im- prover in the transportation path without melting for preparation of a mixed powder paint of a desired hue; electrostatically charging the mixed powder paint containing the fluidity improver in the body; and blowing out the mixed and charged powder paint containing the fluidity improver through the outlet by the pressurized air to electrostatically coat a subject with the mixed and charged pow- der paint. MATTE POLYURETHANE POWDER COATINGS FOR HEAT-RESISTANT SUBSTRATES U.S. Patent 5,811,190. Sept. 22, 1998 H-J. Laas et al., assignors to Bayer AG, Leverkusen, Germany A powder coating composition for the production of matte coatings in which the binder comprises a component having hydroxyl groups; a polyisocyanate having blocked and optionally free iso- cyanate groups; a component hav- ing carboxyl groups and/or car- boxylic anhydride groups; and a component that has groups that are reactive with carboxyl groups and/or carboxylic anhydride groups. WATER-DILUTABLE COATING BASED ON ACRYLATE COPOLYMERS U.S. Patent 5,811,484. Sept. 22, 1998 W. Wilfinger et al., assignors to Vianova Resins AG, Werndorf Austria A process for the preparation of water-dilutable coating binders based on acrylate copolymers, which are obtained by reacting a polycarboxy component with a polyhydroxy component followed by at least partial neutralization of the carboxyl groups. POLYAMIDE COATING COMPOSITION U.S. Patent 5,811,490. Sept. 22, 1998 M.A. Jozokos et al., assignors to Judd Wire Inc., Turner Falls, Mass. A thermoplastic coating composi- tion comprising a polyamide se- lected from the group consisting of nylon 610, nylon 612, nylon 11, nylon 12, and blends thereof; an ionic copolymer; and an unsatur- ated dicarboxylic anhydride com- patibilizer. CASKET ASSEMBLY FROM PHEFINISHED PARTS U.S. Patent 5,813,100. Sept. 29, 1998 W.T. Mackirdy, assignor to Casket Shells Inc., Eynon, Pa. A metal casket shell formed from parts that are prepainted and pre- finished without the need for welding and grinding joints and covers and without destroying the outside surface of the casket to thereby eliminate the need to paint and finish a casket shell in a separate operation. COATING APPARATUS U.S. Patent 5,813,610. Sept. 29, 1998 A.J. Parr and W.W. Wyant, assignors to Carrier Corp., Syracuse, N.Y. An air drying system for a paint coating apparatus. MAGNETIC-ABRASIVE MACHINING U.S. Patent 5,813,901. Sept. 29, 1998 G. Kremen, assignor to Scientific Manufacturing Technologies Inc., Brooklyn, N.Y. A method of magnetic-abrasive machining of a part comprising the steps of forming a magnetic field; arranging a part to be ma- chined in the magnetic field; sup- plying a magnetic-abrasive pow- der in a machining zone toward a surface of the part to be ma- chined; and supplying a fluid jet under pressure toward the mag- netic-abrasive powder so as to move the magnetic-abrasive powder relative to the surface of the part to be machined. METHOD AND APPARATUS FOR PRODUCING BRIGHT AND SMOOTH GALVANIZED COATINGS U.S. Patent 5,814,126. Sept. 29, 1998 T.H. Cook, Spearfish, S.D. A method of cleaning and remov- ing scale from a sidewall of a galvanized kettle containing molten zinc comprising immers- ing a gas injector into the said molten zinc; injecting nitrogen into the molten zinc through the injector below the surface of the zinc and bubbling nitrogen through the molten zinc adjacent a sidewall of the kettle, wherein at least a portion of tlhe nitrogen contacts the wall of the kettle, thereby removing scale from the sidewall and reducing the forma- tion of ash. METHOD FOR VOC ABATEMENT U.S. Patent 5,814,132. Sept. 29, 1998 T.E. Grime et al., assignors to Ransburg Corp., Indianapolis A method for removing VOCs from a gas mixture comprising treating VOC adsorbent mate- rial consisting of an alumino- silicate gel desiccant with a masking agent consisting of wa- ter vapor to reduce the attraction of the adsorbent material for VOCs and to reduce a regenera- tion temperature for desorbing VOCs from the VOC adsorbent material; passing a flow of gas containing VOC vapor through the VOC adsorbent material treated with a masking agent to separate VOCs from the gas through adsorption of such VOCs February 1999 125

Method and apparatus for producing bright and smooth galvanized coatings

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Page 1: Method and apparatus for producing bright and smooth galvanized coatings

powder paint inlets of the body, a fluidity improver inlet of the body, an outlet of the body, a transpor- tation path formed in the body to communicate each of the inlets with the outlet, and a rotary ele- ment having a blade in the trans- portation path comprising sepa- rately introducing plural kinds of powder paints of different hues and a fluidity improver, which possesses a charge control func- tion, into the body by pressurized air; mixing the plural kinds of the powder paints and the fluidity im- prover in the transportat ion path without melting for preparation of a mixed powder paint of a desired hue; electrostatically charging the mixed powder paint containing the fluidity improver in the body; and blowing out the mixed and charged powder paint containing the fluidity improver through the outlet by the pressurized air to e lectrostat ical ly coat a subject with the mixed and charged pow- der paint.

MATTE POLYURETHANE POWDER C O A T I N G S FOR HEAT-RESISTANT SUBSTRATES U.S. Patent 5,811,190. Sept. 22, 1998 H-J. Laas et al., assignors to Bayer AG, Leverkusen, Germany

A powder coating composition for the production of matte coatings in which the binder comprises a c o m p o n e n t hav ing hydroxy l groups; a polyisocyanate having blocked and optionally free iso- cyanate groups; a component hav- ing carboxyl groups and/or car- boxylic anhydride groups; and a component that has groups that are reactive with carboxyl groups and/or carboxyl ic a n h y d r i d e groups.

WATER-DILUTABLE COATING BASED ON ACRYLATE COPOLYMERS U.S. Patent 5,811,484. Sept. 22, 1998 W. Wilfinger et al., assignors to Vianova Resins AG, Werndorf Austria

A process for the preparation of water-di lutable coating binders based on acryla te copolymers, which are obtained by reacting a polycarboxy component with a polyhydroxy component followed by at least partial neutralization of the carboxyl groups.

P O L Y A M I D E COATING C O M P O S I T I O N U.S. Patent 5,811,490. Sept. 22, 1998 M.A. Jozokos et al., assignors to Judd Wire Inc., Turner Falls, Mass.

A thermoplastic coating composi- tion comprising a polyamide se- lected from the group consisting of nylon 610, nylon 612, nylon 11, nylon 12, and blends thereof; an ionic copolymer; and an unsatur- ated dicarboxylic anhydride com- patibilizer.

CASKET A S S E M B L Y FROM PHEFIN ISHED PARTS U.S. Patent 5,813,100. Sept. 29, 1998 W.T. Mackirdy, assignor to Casket Shells Inc., Eynon, Pa.

A metal casket shell formed from parts that are prepainted and pre- f inished wi thou t the need for welding and grinding joints and covers and without destroying the outside surface of the casket to thereby el iminate the need to paint and finish a casket shell in a separate operation.

COATING A P P A R A T U S U.S. Patent 5,813,610. Sept. 29, 1998 A.J. Parr and W.W. Wyant, assignors to Carrier Corp., Syracuse, N.Y.

An air drying system for a paint coating apparatus.

M A G N E T I C - A B R A S I V E M A C H I N I N G U.S. Patent 5,813,901. Sept. 29, 1998 G. Kremen, assignor to Scientific Manufacturing Technologies Inc., Brooklyn, N.Y.

A method of magnet ic-abrasive machining of a par t comprising the steps of forming a magnetic field; arranging a par t to be ma-

chined in the magnetic field; sup- plying a magnet ic-abrasive pow- der in a machining zone toward a surface of the par t to be ma- chined; and supplying a fluid jet under pressure toward the mag- net ic-abrasive powder so as to move the m a g n e t i c - a b r a s i v e powder relative to the surface of the par t to be machined.

METHOD A N D A P P A R A T U S FOR P R O D U C I N G BRIGHT A N D S M O O T H GALVANIZED COATINGS U.S. Patent 5,814,126. Sept. 29, 1998 T.H. Cook, Spearfish, S.D.

A method of cleaning and remov- ing scale from a sidewall of a g a l v a n i z e d k e t t l e c o n t a i n i n g molten zinc comprising immers- ing a gas injector into the said molten zinc; injecting nitrogen into the molten zinc through the injector below the surface of the zinc and b u b b l i n g n i t r o g e n through the molten zinc adjacent a sidewall of the kett le, wherein at least a portion of tlhe nitrogen contacts the wall of the kettle, thereby removing scale from the sidewall and reducing the forma- tion of ash.

METHOD FOR VOC A B A T E M E N T U.S. Patent 5,814,132. Sept. 29, 1998 T.E. Grime et al., assignors to Ransburg Corp., Indianapolis

A method for removing VOCs from a gas mixture comprising t rea t ing VOC adsorbent mate- rial consist ing of an alumino- s i l i ca te gel d e s i c c a n t w i th a masking agent consisting of wa- ter vapor to reduce the at t ract ion of the adso rben t ma te r i a l for VOCs and to reduce a regenera- tion t empera tu re for desorbing VOCs from the VOC adsorbent material; passing a flow of gas containing VOC vapor through the VOC a d s o r b e n t m a t e r i a l t rea ted with a masking agent to s e p a r a t e VOCs from the gas through adsorption of such VOCs

February 1999 125