Irving B Ruppel

US Patent:

54806950, Jan 2, 1996

Filed:

Aug 10, 1994

Appl. No.:

8/288386

Inventors:

Michael A. Tenhover - East Amherst NY
Irving R. Ruppel - Kenmore NY

International Classification:

B32B 900

US Classification:

428 655

Abstract:

Substrates are disclosed having an ultra-smooth surface finish thereon rendering them useful in making high density magnetic storage components, such as a computer hard disk or thin-film head which can read and/or write data on such disks. The substrates are comprised of a non-oxide ceramic base which is coated with a smoothing layer comprised of amorphous, non-stoichiometric silicon carbide corresponding to the formula SiC. sub. x, wherein x is the molar ratio of carbon to silicon and is greater than 1. Also disclosed are processes for making the substrates and components.

US Patent:

56164262, Apr 1, 1997

Filed:

Sep 29, 1995

Appl. No.:

8/536716

Inventors:

Michael A. Tenhover - East Amherst NY
Irving B. Ruppel - Kenmore NY

Assignee:

The Carborundum Company - Worcester MA

International Classification:

B32B 900

US Classification:

428688

Abstract:

Substrates are disclosed having an ultra-smooth surface finish thereon rendering them useful in making high density magnetic storage components, such as a computer hard disk or thin-film head which can read and/or write data on such disks. The substrates are comprised of a non-oxide ceramic base which is coated with a smoothing layer comprised of amorphous, non-stoichiometric silicon carbide corresponding to the formula SiC. sub. x, wherein x is the molar ratio of carbon to silicon and is greater than 1. Also disclosed are processes for making the substrates and components.

US Patent:

52271056, Jul 13, 1993

Filed:

Jul 9, 1990

Appl. No.:

7/524264

Inventors:

James L. Eucker - Fairview Park OH
Robert C. Ruhl - Cleveland Heights OH
Irving B. Ruppel - Kenmore NY

Assignee:

The Carborundum Company - Niagara Falls NY

International Classification:

C04B 3564

US Classification:

264 57

Abstract:

Ceramic tubes are manufactured from a mixture that includes ceramic powder. The mixture is extruded through a die to form a tube. The tube is passed through an open-ended dryer, calciner, transition zone, sintering furnace, and cooler. Thereafter, the tube is cut to the desired length (which may be very long). The quality of the tube is enhanced by applying a vacuum to the mixture prior to extrusion. For tubes made of non-oxide ceramics, an inert atmosphere is maintained both inside and outside the tube in all sections of the equipment that operate above 200. degree. C. A controlled tension is applied to the tube by means of first pinch rolls disposed downstream of the dryer and second pinch rolls disposed downstream of the cooler.

US Patent:

59449632, Aug 31, 1999

Filed:

Apr 7, 1997

Appl. No.:

8/833434

Inventors:

Irving B. Ruppel - Kenmore NY
William J. Keese - Youngstown NY

Assignee:

The Carborundum Company - Niagara Falls NY

International Classification:

C23C 1435

US Classification:

20419223

Abstract:

The invention provides a silicon carbide sputtering target comprising non-stoichiometric silicon carbide, SiC. sub. x, where x is the molar ratio of carbon to silicon and x is greater than about 1. 1 but less than about 1. 45. The sputtering target of this invention is superior to sputtering targets prepared from presently available non-stoichiometric silicon carbide in that the DC magnetron sputtering rate using the new sputtering target is nearly an order of magnitude higher than the rate achievable with presently available targets. The invention also includes processes for making the new sputtering target and preparing superior silicon carbide films by sputtering the target.

US Patent:

54417996, Aug 15, 1995

Filed:

Jan 4, 1994

Appl. No.:

8/177642

Inventors:

Dean P. Owens - Tonawanda NY
Irving B. Ruppel - Kenmore NY

Assignee:

The Carborundum Company - Niagara Falls NY

International Classification:

C04B 3556

US Classification:

4283126

Abstract:

Silicon carbide sintered bodies having controlled porosity in the range of about 3-25 vol % are prepared from raw batches containing a multimodal distribution of silicon carbide particles and comprised of at least a first set of particles having one average grain size and a second set of particles having another average grain size larger than the first set of particles. The resulting pores are 3-5 microns in the largest dimension, with an aspect ratio between about 1/1 and about 3/1. The porous bodies, e. g. , in the form of mechanical seal members, exhibit good tribological properties.

US Patent:

50570013, Oct 15, 1991

Filed:

Mar 10, 1989

Appl. No.:

7/322482

Inventors:

James L. Eucker - Fairview Park OH
Robert C. Ruhl - Cleveland Heights OH
Irving B. Ruppel - Kenmore NY

Assignee:

The Carborundum Company - Niagara Falls NY

International Classification:

B29C 4788
B29C 3502
B29C 3516

US Classification:

425315

Abstract:

Apparatus for making ceramic tubes from a mixture that includes ceramic powder. The mixture is extruded through a die to form a tube. The tube is passed through an open-ended dryer, calciner, transition zone, sintering furnace, and cooler. Thereafter, the tube is cut to the desired length (which may be very long). The quality of the tube is enhanced by applying a vacuum to the mixture prior to extrusion. For tubes made of non-oxide ceramics, an inert atmosphere is maintained both inside and outside the tube in all sections of the equipment that operate above 200. degree. C. A controlled tension is applied to the tube by means of first pinch rolls disposed downstream of the dryer and second pinch rolls disposed downstream of the cooler.

US Patent:

57414033, Apr 21, 1998

Filed:

Dec 18, 1996

Appl. No.:

8/769165

Inventors:

Michael A. Tenhover - East Amherst NY
Irving B. Ruppel - Kenmore NY

Assignee:

The Carborundum Company - Niagara Fass NY

International Classification:

G11B 1110

US Classification:

2041922

Abstract:

Substrates are disclosed having an ultra-smooth surface finish thereon rendering them useful in making high density magnetic storage components, such as a computer hard disk or thin-film head which can read and/or write data on such disks. The substrates are comprised of a non-oxide ceramic base which is coated with a smoothing layer comprised of amorphous, non-stoichiometric silicon carbide corresponding to the formula SiC. sub. x, wherein x is the molar ratio of carbon to silicon and is greater than 1. Also disclosed are processes for making the substrates and components.