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 |
| 6289599 | Apparatus for measuring the thickness of sliver bundle formed of a plurality of side-by-side running slivers An apparatus for measuring the thickness of a plurality of side-by-side running slivers includes a supporting surface guiding the side-by-side running slivers thereon in a single plane; a holding member; and a plurality of sensor elements movably secured ... | 09/18/2001 |
| 6018129 | Solid-state sliver sensor and auto-leveler for textile machine A strain gauge sensor for measuring the unit weight of a moving sliver in a textile machine, comprising a support rigidly mounted on a sliver output end of the textile machine and a trumpet carried by the support for outputting a condensed sliver. At leas... | 01/25/2000 |
| 5713106 | Process to ensure precise autolevelling for the drafting of a fiber sliver in a pre-spinning machine and device to carry out the process The invention relates to a process to ensure precise autolevelling for the drafting of a fiber structure in a pre-spinning machine, whereby an open control circuit controls the drafting of the fiber sliver through the drafting rollers, whereby the fiber s... | 02/03/1998 |
| 5619772 | Sliver guide assembly including a thickness sensor and a movable counterelement An apparatus for measuring sliver thickness in a drawing frame includes a sliver guiding device having converging inner wall faces for bringing a plurality of simultaneously introduced slivers together to form a sliver assembly constituted by side-by-side... | 04/15/1997 |
| 5157810 | Apparatus for measuring the mass of a sliver For use in a spinning mill, the apparatus is used to even up the mass of sliver being conveyed, for manufacturing perfect roving yarns. The evening up takes place by measuring the thickness of the sliver after it has been compressed to a certain volume in... | 10/27/1992 |
| 5123280 | Device for measuring the thickness and/or the unevenness of slivers A sliver measuring device includes a pair of rollers (6, 7) which limit two sides of a rectangular measuring space (3). A third side of the measuring space (3) is closed off by a guide roller (8) or by a guide plate. A measuring element (5) for the thickn... | 06/23/1992 |
| 4987648 | Combing machine with workstations having a monitoring unit at each workstation The combing machine is provided with a plurality of workstations each of which is provided with a table containing a funnel through which a combed web is formed into a sliver. Each table is pivotally mounted on a fixed shaft and a monitoring unit is provi... | 01/29/1991 |