Joseph P Callahan

US Patent:

41350243, Jan 16, 1979

Filed:

Aug 16, 1976

Appl. No.:

5/715175

Inventors:

Joseph W. Callahan - Drexel Hill PA
John G. Trumbull - Lima PA

Assignee:

Scott Paper Company - Philadelphia PA

International Classification:

B32B 330
B32B 3120

US Classification:

428171

Abstract:

Densified regions are formed in a low integrity dry-formed nonwoven fibrous web by embossing a front surface of the web with spaced-apart raised surfaces of an embossing roll. The web is embossed to the extent that the densified regions will transmit a treating fluid completely through their thickness to the front surface of the web while non-densified or high loft regions will not. Simultaneously with the embossing, treating fluid from a treating fluid conveying surface is applied to a rear surface of the web. The fluid migrates completely through the thickness of the web to the front surface in substantially only the densified regions of the web. The product of this invention is a dry-formed web having a basis weight in the range of about 0. 5 oz. /yds. sup. 2 to about 8. 0 oz. /yds. sup. 2. A surface of the web has an undulate profile including high loft regions and valley regions.

US Patent:

41663764, Sep 4, 1979

Filed:

Apr 17, 1978

Appl. No.:

5/896809

Inventors:

Joseph T. Callahan - Medford NJ
Charles R. Delp - Carlisle PA

International Classification:

G01C 2500

US Classification:

73 1F

Abstract:

The described apparatus is designed to be inserted into a fluidized solids temperature calibration bath to eliminate dusting, particle impingement and test instrument temperature environmental problems.