Martin Allen Hubbe

50476521, Sep 10, 1991

Apr 16, 1990

7/509589

Khaim Lisnyansky - Chester NY
Martin A. Hubbe - New Windsor NY

International Paper Company - Tuxedo Park NY

G01N 2186
G01N 2189

250571

Systems for the on-line optical measurement of properties of a translucent moving web, such as paper or plastic, as it is continually produced, colored or otherwise converted. Measured properties include color, reflectance and opacity. A backing roll has a cylindrical or approximately cylindrical surface which comprises at least one optical standard. The roll is positioned such that a circumferential portion of the roll surface contacts the back web surface where the web characteristic is to be measured, with the web curving around the circumferential portion. An optical sensing device is positioned so as to view the front web surface backed by the optical standard or standards. In several embodiments, two sets of reflectance data are collected, one with a "white" optical standard backing and the other with a "black" optical standard backing. The backing roll surface and the optical sensing device can be arranged such that the sensing device either alternately or simultaneously views portions of the front web surface backed by each of the optical standards. In other embodiments, the backing roll has a uniform optical standard surface.

59581808, Sep 28, 1999

Sep 23, 1997

8/935387

Martin A. Hubbe - Campbell Hall NY
Dinkar G. Wagle - Monroe NY
Erwin R. Ruckel - Wilton CT

International Paper Company - Purchase NY

D21C 900

162 9

Processes for increasing the strength of cellulosic fibers are carried out by contacting relatively dry cellulosic fibers with an agent in particulate or vapor form comprising a carboxylic acid cyclic anhydride at an elevated temperature for a time sufficient to significantly increase the bonding strength of the fibers. The treated fibers bond more readily to one another and they also hold wet and dry strength aids more strongly. Furthermore, the treatment does not significantly affect the internal chemical structure of the fibers so that paper made from the fibers exhibits overall improved dimensional stability.

59361514, Aug 10, 1999

Dec 22, 1997

8/995672

Martin Allen Hubbe - Campbell Hall NY

International Paper Company - Purchase NY

G01N 3334

73 5303

An apparatus for determining an electrical characteristic of a papermaking furnish includes a sample chamber having first and second sections for containing a sample of the papermaking furnish. A fiber-collecting screen having a mesh sufficient to inhibit the passage of suspended fibers separates the first and second sections of the sample chamber. Furnish is urged back and forth through the screen in a plurality of cycles so that as furnish flows in one direction through the screen, a fiber pad is formed adjacent the screen and as furnish is moved through the screen in a second direction, the fiber pad is expelled from the screen back and redispersed back into the furnish sample. A stirrer or mixer assists in removing the fiber pad from the screen and in redispersing fibers comprising the fiber pad back into the furnish sample. As furnish is urged through the screen, electrodes positioned on opposite sides of the screen produce signal outputs corresponding to an electrical characteristic of the furnish. A voltmeter receives the electrode outputs and measures voltage across the screen.

61769746, Jan 23, 2001

Dec 22, 1997

8/995668

Martin Allen Hubbe - Campbell Hall NY

International Paper Company - Purchase NY

D21F 1100
D21F 1300
D21H 2300

162158

A method and apparatus for determining electrokinetic properties of a papermaking furnish includes mixing a sample of furnish in a container with a known amount of a charged additive and then measuring the streaming potential of the resultant ionically modified furnish sample. The amount of charged additive added to the container is increased or decreased as repeated streaming potential measurements are made until a desired streaming potential of the modified furnish sample is obtained. The results, which are expressed as the amount of titrant required to achieve the desired streaming potential in a given volume of furnish, may be used by papermakers to adjust process variables and achieve optimum, stable paper quality and machine runnability.