Andrew P Grow, 572280 Congress Lake Rd, Mogadore, OH 44260

2007028, Dec 20, 2007

Jun 19, 2006

11/455902

Andrew Grow - Mogadore OH, US
Henry Pawlowski - Seville OH, US
Keith Buzek - Akron OH, US

G01N 11/10

73 5427

A rheometer die with a groove configuration for reducing sample slippage in a rheometer chamber is provided. The rheometer die includes a surface and at least one radial groove extending into the surface. The groove defines at least a portion of a sample-holding chamber constructed to hold a sample. The groove may include a first zone and a second zone with a transition zone therebetween. The groove may also include a substantially wedge-shaped portion with sidewalls which taper generally towards the center of the rheometer die such that imaginary extensions of the sidewalls intersect before reaching the center of the die. A plurality of grooves may extend into the rheometer die. The rheometer die may be incorporated into a rheometer for testing process characteristics of a material.

2018028, Oct 4, 2018

Feb 28, 2018

15/908391

- Canton OH, US
Kenneth J. Erskine - Chapel Hill TN, US
Andrew P. Grow - Mogadore OH, US
Christopher L. Tokarcik - Mogadore OH, US
Robert Prachar - Akron OH, US

B08B 9/055

In a tube cleaning system and method, multiple steps can be run with a single pass by using a combination pig train. For example, an initial combination pig train may include a plurality of bristle pigs and polymer trailing pigs with a cleaning solution between each pair. One example is a first leading bristle pig and a first trailing polymer pig containing a first slug of caustic cleaning solution followed by a second bristle pig and second polymer trailing pig containing a second slug of caustic cleaning solution. Another example is a leading bristle pig, a middle bristle pig, and a trailing polymer pig with a cleaning composition disposed between the leading and middle bristle pigs and a cleaning composition disposed between the middle bristle pig and the trailing pig. Such combination pig trains are moved through the tube to be cleaned in a single pass to achieve two cleaning steps.