Abstract: The present invention relates to a device for scraping material from the earth. The device has a scraper housing, which may be attached to the front of a bulldozer or other earthmoving vehicle. The scraper housing may generally include a back wall, a first side wall, a second side wall, a center support wall, and a brace. The device may be equipped with a scraper blade attached to an earth transfer plate, the scraper blade attached proximate to the front of the scraper housing. As the scraper housing is urged forward, the scraper blade scrapes material from the earth which, by the force of the material being scraped, is forced along the earth transfer plate. After reaching the end of the earth transfer plate, the material can be deposited onto a scraper conveyor that has a belt extending between the side walls of the housing. The scraper conveyor belt continuously moves material toward an opening in the second wall.

Abstract: A web-chopping and sheet-winding apparatus comprising an unwinder for unwinding a supply roll of continuous flexible web which may be adhesive on at least one side. A knife roller including at least one fixed transverse knife blade extending from the surface is in nipped relationship with an anvil roller, the height of the knife blade being greater than the thickness of the web. The anvil and knife roller spacing is such that the knife blade extends just to the surface of the anvil roller, thereby chopping the continuous web into sheets as the anvil and knife rollers turn synchronously with the web passing therebetween. A tape core roller in nipped relationship receives the chopped sheets sequentially, the leading edge of each sheet being lifted from the anvil roller by any of a plurality of novel means.

Abstract: A CCR system 100,200 for removing and analyzing particles from a surface 104 of a substrate 102. A CCR 113 is selectively contactable with the substrate surface. The CCR rolls along the surface, which typically is drawn past the CCR as a continuous moving web on a roller 108, the CCR being rotatably mounted on an axle of the system. In a first embodiment 100, the CCR may be removed for off-line analysis of contamination. In a second embodiment 200, the CCR may remain in operation for real-time analysis of removed contamination. A video camera 122,222 scans the CCR surface and transmits images or data for visual and/or computer analysis of the contamination, which analysis may include, but is not limited to, computerized shape analysis of particles, areal distribution of particles, and composition of particles.

Abstract: A cleaner assembly for cleaning a roller comprising a tape unwinder and winder for holding and dispensing adhesive tape which may be a continuous strip or may comprises discrete sheets of adhesive tape wound on top of each other. The winder and unwinder are connected to a drive by a timing belt. Thus a length of tape may be wound back and forth on a roller surface by alternating the rotation of the drive. The tape is passed around a backing roller to press the tape against a roller to be cleaned. In a second embodiment, the tape roll comprises a plurality of sheets of tape wound on top of each other. To remove a spent outer sheet, the outer sheet carrying the transferred particles is transferred to a continuous tape roll, exposing a fresh sheet on the sheeted tape roll which is then ready for renewed cleaning service.