George B Nelson

US Patent:

51055155, Apr 21, 1992

Filed:

Nov 16, 1990

Appl. No.:

7/614586

Inventors:

George C. Nelson - Renton WA

Assignee:

The Boeing Company - Seattle WA

International Classification:

B25B 2714

US Classification:

292813

Abstract:

An adjustable clamp assembly for use in an automated assembly tool. The clamp assembly includes a column portion and a clamp portion, the column portion being mounted to a support of a jig structure for longitudinal movement relative thereto. The jig supports are spaced apart to receive the components which are to be assembled, and the clamp portions are mounted on the ends of the column portions which protrude into the working envelope between the supports. The column portions are selectively movable relative to the supports so as to adjust the distances by which the clamp portions extend into the working envelope. A threaded shaft is rotatably mounted to the column portion and is rotated by an electric motor so that the shaft interacts with a threaded nut in the column to effect the longitudinal movement. The clamp portion on the end of the column portion has a fixed locating hook and a pneumatically actuated clamping hook which pivots from an open position to a closed position to grip the components to be assembled. The positioning of the clamp assemblies and the operation of the pneumatically actuated clamps is directed by the automated computerized control portion of the assembly machine.

US Patent:

41984714, Apr 15, 1980

Filed:

Apr 4, 1978

Appl. No.:

5/893647

Inventors:

George R. Nelson - Issaquah WA

Assignee:

Weyerhaeuser Company - Tacoma WA

International Classification:

B05D 302
B05D 312
B32B 2710
B32B 2742

US Classification:

428513

Abstract:

The combination of a thermoplastic polymer and a thermosetting polymer, provides a pigment system for producing coated printing papers. The thermoplastic polymer and thermosetting polymer, suspended in well-known coating binders and carriers, is applied to the web substrate on a standard paper machine. The amount of thermoset, preferably at least about 25% by weight of the pigment solids, improves ink receptivity and allows adjustable control of finished paper gloss. The amount of thermoset added to the pigment system is limited, however, preferably below about 75% by weight of the pigment solids, so that the finished printing paper obtains a Gardner 75. degree. gloss of at least about 40, at calendering pressures of less than 500 PLI.