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William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7166229 | Method and apparatus for extracting liquid present in a humid mass A system for extracting a liquid by pressing a humid mass, the system including at least one extraction channel, while extraction channel being provided with at least one inlet allowing to feed the extraction channel with the humid mass to be treated; with walls pro... | 01/23/2007 |
| 5673863 | Size reduction apparatus for the production of prismatical and particularly cubical particles from cuttable materials An apparatus for cutting cuttable pieces, especially of animal or vegetal origin, into prismatic, preferably cubical shape, includes two concentric knife rotors, inner and outer knife rotors. The inner knife rotor carries a first cutting tool for cutting ... | 10/07/1997 |
| 5509612 | Process and device for the continuous shaping of particulate materials The device for continuous mechanical shaping of a particulate material includes a housing; a pressing roll pair forming a pressing space and enclosed in the housing; a rotating element which can be a size reduction roll or a rotor with screen insert arran... | 04/23/1996 |
| 5383609 | Method for pulverization of vegetable fiber materials and its pressure roller system The manufacture of fine powder from vegetable fiber materials at relatively low cost and without contamination, wherein the manufacturing system involved is equipped with a pressure roller system having a couple of pressure rollers, each having teeth of w... | 01/24/1995 |
| 5373999 | Grinding and mixing device A rotary tank supported by a bearing stand on a horizontal shaft in a freely rotatable manner to form a grinding/mixing chamber having an inner wall of modified cross-section such as oval one at the horizontal center axis position is driven by a rotary dr... | 12/20/1994 |
| 4858834 | Chip slicer improvement Apparatus and a process for use in preparing pulp for papermaking and particularly the preparation of wood chips including a rotary anvil with vanes forcing wood against a cutting knife and an infeed chute directing wood into the radial interior of the ro... | 08/22/1989 |
| 4235382 | Method and apparatus for rechipping wood chips A wood chip rechipping method and apparatus are provided wherein a slotted, cylindrical drum rotates about a concentrically mounted rotatable anvil rotor having a plurality of arms, each of which has a blade at its outer extremity. The drum and anvil roto... | 11/25/1980 |
| 4109690 | Chipper A chipping apparatus for producing chips from entire trees, branches, shrubs, and the like comprises a rotatable cylindrical drum having a plurality of finger-like blades projecting from the surface. An axially parallel cylindrical counter-blade, having r... | 08/29/1978 |
| 4083501 | Material disintegrating apparatus The present invention provides an apparatus for disintegrating large bales of material. The apparatus includes a plurality of disintegrating rolls in combination with means for advancing a bale into the rolls. The rolls are arranged in a vertically extend... | 04/11/1978 |
