Ashland Oil, Inc.

Edison Welding Institute, Inc.

Other

Colgate Palmolive Company

Northrop Corporation

Robert A Grimm

Anil B Goel

Harvey J Richards

Joseph G Holehouse

Biau-Hung Chang

Dace Grote

Bhupendra C Trivedi

Jai H Kyung

Bruce M Russell

Heimo J Langer

Richard V Norton

Phyllis L Brusky

Peter E Throckmorton

Neil A Randen

Peggy A Blackburn

Wayne William Schmidt

Gary E Sitz

Alexander Savitski

Marc A St John

R B McConnell

Christopher L Demas

John F Plummer

David A Grewell

John A Molnar

William P Benjamin

Wanda F Wine

A method for production of simultaneous lap and butt joints directs electromagnetic radiation ( ) through a radiation transmitting material ( ) to an absorbing material ( , and ) that absorbs radiation ( ) with the generation of heat. The heat provides sufficient molten material in interfaces ( , and ) to fuse and bond: 1) pipe ends ( ) to each other in a butt joint ( ), 2) pipe end portion ( ) to sleeve ( ) in a lap joint ( ), and 3) pipe end portion ( ) to sleeve ( ) in a lap joint ( ). Use of a sufficiently clear material for sleeve ( ) allows visual inspection of joints ( , and ). Butt joint ( ) can be formed by conductive heating without absorbing material ( ) to provide a smooth interior bore useful for transporting high purity fluids without risk of absorbent contamination or debris and organism collection in gaps found in previous joining techniques.

Simultaneous butt and lap joints

The present invention relates to a method of welding pre-formed toothbrush heads and handles using about 0.7 to about 2.0 micrometers, or about 4.0 to about 6.0 micrometers, wavelength laser beam.

Laser joining toothbrush heads to handles

Joining method

A plastic joining method directs polychromate, non-coherent electromagnetic radiation through a transmitting plastic to an absorbing material that absorbs the radiation with the generation of heat. The heat is used to heat a bond line formed from the transmitting plastic and a substrate sufficiently to bond the transmitting plastic and substrate. A radiation filter of the same material as the transmitting plastic is used to reduce effectively unwanted absorption (and heat) in the transmitting plastic. Radiation focusing, masking, transmitting plastic cooling, bond line component drying, double pass welding, and additional bond line pressure are used to improve the bond of the resulting manufacture.

Plastic joining method

Conventional infrared, spot reflector lamps are modified by removing portions of the reflector to form reflector edges and then placing the reflector edges next to each other to form an array of lamps with a wide variety of configurations. The combined lamps are particularly effective when the filaments of each lamp are oriented in the same direction as that of a desired heating line. Maximum energy flux density is achieved by positioning the lamps at a distance of about twice the focal length of the uncut, spot-focused lamps. By removing segments from the reflectors to form edges that define planes that are parallel to or intersect with each other, various shaped reflectors are formed that are used to assemble arrays that provide uniform heating lines of various shapes.

IR heating lamp array with reflectors modified by removal of segments

A process for obtaining long, continuous, thermoplastic welds on large structures. A series of tabs are used in pairs and especially in alternating, overlapping pairs to obtain resistance heating of a strip material placed in the bond line. The resistance of the tabs is less than that of the strip material. Conducting braid-tubes afford continuous welding when the bond line is curved. Alternatively, an electromagnetic field is used to take advantage of the induction heating. A wide susceptor is used to weld a current conducting substrate while avoiding bulk heating of the substrate. The unexpected property of current-conducting braid-tube susceptors, in which induction heating takes place at the center rather than at the edges of a flattened braid-tube susceptor, is used to obtain long continuous curved welds.

Thermoplastic welding

Induction heating of thermoplastic composite materials is accomplished to form a continuous bonded joint. A zone of optimum heating can be created by an induction heating coil mounted within and adjacent to the drum of a hollow circular roller of non-conductive material (i.e., transparent to the RF field) so that an induction heating field can be created and localized to create a zone of optimum heating at the joint area of the material to be bonded. Simultaneously pressure to that area can be applied by the circular roller. In a preferred form, the roller is semi-rigid to permit spreading of the contact surface with the joint area to avoid absolute contact line loading. A hand held induction heating unit with a finger operable power switch can be moved in a back and forth manner over the joint to apply heat when the switch is turned on and effect consolidation when the switch is turned off. Using the techniques of the invention, one can fuse two contacting members which are comprised of filamentary reinforced composite materials in which the matrix resin at the joint interface is a member of the thermoplastic family of polymers. The invention concentrates radio frequency (RF) energy at the joint interface which heats the surrounding layers and simultaneously provides for the application of a controlled force normal to the mid-plane of the joint to retain compaction of the laminates which would normally be relieved in a hot unrestrained condition.

Thermoplastic composite induction welder

Fast curing adhesives which are free of solvent and have high heat resistant bonding strength composed of mixtures of polyols, polyepoxides and polyisocyanates are described.

Polyol/polyepoxide/polyurethane adhesive

A method of producing methyl formate from methanol and carbon monoxide using an anionic transition metal catalyst including a metal selected from Fe, Ru, Os, W, Mo, Cr, Co, Rh and Ir. The reaction is characterized as a low pressure reaction conducted at a pressure less than 3,000 psia and using concentrated anhydrous methanol solutions and, preferably neat methanol. The catalyst can be a mixed metal catalyst including a second metal selected from Group VIII metals. The reaction is highly selective towards methyl formate and excellent turnover numbers are obtained using these catalysts.

Method of producing methyl formate from methanol and carbon monoxide

The process for modifying the surface of a filler or reinforcing material comprising contacting said surface with a bicyclic amide acetal at a temperature in the range of from about 60.degree. C. to about 350.degree. C. is described.

Surface modification of inorganic fillers by treatment with bicyclic

A process is described for the manufacture of aryl esters such as phenyl esters by liquid phase reaction of an aromatic compound such as benzene with molecular oxygen in the presence of a carboxylic acid preferably having 6 or more carbon atoms over a catalyst composed essentially of a compound of palladium and an antimony compound wherein the aromatic compound is added continuously to the reaction and water formed in the reaction is rapidly and continuously removed from the reaction zone.

Manufacture of phenyl esters

A process for preparing menthane diisocyanate by reaction of a terpinyl monoisocyanate with isocyanic acid in a medium which is an excess of isocyanic acid, a polar solvent, or a mixture of solvents which includes a polar solvent in the presence of a catalyst which is a Bronsted acid or a Lewis acid is disclosed.

Preparation of menthane diisocyanate by addition of isocyanic acid to

Tantalum (TaF.sub.5) or antimony pentafluoride (SbF.sub.5) is separated from a product mixture comprised of HF, isobutyryl fluoride and TaF.sub.5 or SbF.sub.5 by distillation below 760 mm of mercury.

Growing community of inventors

Columbus, OH, United States of America

Robert A Grimm