Abstract: A shredder is disclosed having a jam proof system. In one embodiment, the jam proof system provides a thickness detector having a contact member which displaces as an article is inserted into a throat of the shredder and a resistance generating mechanism configured to provide a resistance force to the contact member, in response to displacement of the contact member. The greater the thickness of the material the greater the resistance force that will be realized. When the material reaches a predetermined thickness, there will be a significant change in the resistance force. The resistance generating mechanism may include at least two spring mechanisms serially arranged, such as, a first spring mechanism and a second spring mechanism. This feature provides immediate and direct feedback to the user that the article inserted into the shredder may be too thick.

Abstract: A sizing roller screen apparatus and method for processing an ore feed received at an inlet is disclosed. The ore feed includes sized ore portions and oversize ore portions. The apparatus includes a roller screen having a plurality of adjacent screening rollers supported to provide interstices therebetween for permitting passage of the sized ore portions between the adjacent screening rollers, the adjacent screening rollers being operably configured to rotate to cause a first sized ore portion to pass through the interstices while the ore feed is being transported along the roller screen. The apparatus also includes a sizing roller disposed generally above an opposing one of the plurality of adjacent screening rollers, the sizing roller being operably configured to rotate to fragment at least some of the oversize ore portions passing between the sizing roller and the opposing screening roller to produce a second sized ore portion, the second sized ore portion being sized for passage between the interstices.

Abstract: A shredder head adapted to shred data bearing documents and/or bottles.

Abstract: This specification discloses a shredder paper passage with a narrower neck part. From top down, the shredder paper passage has a first passage and a second passage, both in a horn shape. The intersection of the two passages forms the narrowed neck part. When the user's fingers are inserted into the paper passage, they are stopped by the narrower neck part. This protects the user from getting hurt.

Abstract: Waste glass containing three-dimensional extraneous matter to be removed is dropped onto a grizzly and is thereby broken up by gravity and separated into an undersize portion containing planar fragments of waste glass and of extraneous matter and an oversize portion containing three-dimensional large pieces of waste glass and unbreakable extraneous matter, the grizzly comprising parallel bars arranged at a spacing smaller than the minimum width of projection of the three-dimensional extraneous matter. The oversize portion is repeatedly subjected to the same procedure as above to break up the waste glass to an undersize material within a specified range of sizes and to remove the three-dimensional extraneous matter from the waste glass. A breaking and separating apparatus comprises grizzlies arranged in multi-stage fashion within a passage for dropping the waste glass or a rotatable drum-shaped grizzly having scraping plates.