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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 |
| 4126913 | Opening machinery for textile fibers Fine opening mechanism for textile fibrous material which comprises a primary opening element such as a spiked beater roll and means for delivering a single undivided mass of textile fibers toward the primary opening element. A plurality of feed elements ... | 11/28/1978 |
| 4122582 | Fiber mat forming machine A soft, loosely compacted mat of fibers is continuously formed atop a traveling conveyor. The fibers are deposited on top of the screen from an air-fiber flow within a suitably sized conduit having the same width as the desired width of the mat. A fiberiz... | 10/31/1978 |
| 4064597 | Prevention of fibers from entering the pinch point between a rotating feed roll and a stationary shoe A compressed batt of fibers is fed against a rotating toothed roll for dispersion of the fibers from the batt and this dispersion of fibers is fed through the point of closest clearance between the toothed roll and a feed roll rotating in the opposite dir... | 12/27/1977 |
| 4064599 | Fiberizing method and apparatus employing differential feed system Method and apparatus for separating fibers from a stack of fibrous sheets, either in roll or bale form, by directing the stack of sheets into engagement with a fiberizing means employs a differential feed system for directing the bottom sheet, or sheets, ... | 12/27/1977 |
| 4043004 | Retracting tooth processing cylinder apparatus An apparatus and method of processing textile stock to achieve cleaning and opening by use of a retracting tooth processing cylinder is disclosed. Self doffing is achieved by means of each tooth folding from a positive rake to a negative rake and eventual... | 08/23/1977 |
| 4035871 | Opening and cleaning apparatus for an open end spinning unit In order to provide effective cleaning of the opened fibrous material to be supplied to a spinning rotor, the fiber tuft projects into a removal opening opposite the opener roller, thereby permitting the impurities to be beaten out of the fibers, clamped ... | 07/19/1977 |
| 4014076 | Housing with groove The present invention provides an improvement in a fiber drafting assembly which includes an opening roll, the improvement wherein the assembly has a housing member extending about at least a portion of the circumference of the opening roll, the housing m... | 03/29/1977 |
| 4001916 | Feed mechanisms for fiber processing machines Fiber processing machinery including feed plates, carding plates and web strippers wherein means are provided for carefully adjusting the relative settings of adjacent components of such plates and strippers.... | 01/11/1977 |
| 3941530 | Conversion of nonwoven fabric into staple fibers Nonwoven fabric is fed at a first rate into the bite between a first shredding element and a stationary working surface. The first shredding element has a plurality of projections which penetrate the fabric and at least substantially shred the fabric as t... | 03/02/1976 |
