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 |
| 7048136 | Canister lid with improved evacuation and vent assembly A canister lid includes a cover member adapted to cover a canister, thereby defining an interior of the canister. An evacuation valve is adapted to allow evacuation of the interior of the container. A vacuum release valve is adapted to allow venting of the interior ... | 05/23/2006 |
| 5603579 | Paper transfer apparatus and printer using the same A paper transfer apparatus for transferring a recording paper by rotating a first and second sprocket wheels having a plurality of pins to be engaged with sprocket holes disposed on both sides of the recording paper comprising a first paper guide for form... | 02/18/1997 |
| 5395028 | Apparatus for transporting thin metal sheets longitudinally with transverse tension A thin strip or flat web of metal material is transported longitudinally in a stable manner and without contact to the working surface by providing a generally constant transverse tension to the web. Equally spaced holes are punched along the outer edges ... | 03/07/1995 |
| 5320267 | Web transport apparatus A web transport apparatus that will not cause the web to break by exerting external forces in different ways on two lateral sides. The transport apparatus includes a group of pins that are studded on flat plates connected together to form a chain on eithe... | 06/14/1994 |
| 5244137 | Film transport device with sprocket teeth and film pressure skid A film transport device for a film with two uniformly distributed rows of holes. Transport is accomplished with a film transport sprocket with a series of teeth disposed in spaced array along a cylindrical tooth circle, which teeth engage the holes in the... | 09/14/1993 |
| 5110025 | Paper feeder having a paper exhaustion detector A cover is disclosed for a paper feed tractor having first and second side frames, a paper receiving plate extending perpendicularly from the second side frame and having a hole formed therein, and a paper exhaustion detector mounted to the second side fr... | 05/05/1992 |
| 4990010 | Paper feed tractor with fixed and pivotable pressure plates A pin-tractor type paper feed mechanism is disclosed which includes feed belt with pins for feeding paper having perforations along the edges of the paper, the pins of the feed belt being engageable with the perforations of the paper. An endless film is p... | 02/05/1991 |
| 4817842 | Door and spring assembly for a paper feed mechanism A feed mechanism for a printer having a door with hinge elements connected by hinge pins to the tractor body so as to be rotatable between first and second position. The hinge elements have rotary cams with convex and planar surfaces. A single flat steel ... | 04/04/1989 |
| 4693620 | Variable width paper feeder for perforated and unperforated paper A paper feeder for a printer having a platen and a printing member disposed in confronting relation to the platen includes a pair of slide blocks which can be moved to vary the spacing therebetween dependent on the width of recording paper placed on the p... | 09/15/1987 |
| 4637537 | Paper feeder for a printer A paper feeder unit for a printer is provided adjacent to a platen to feed a paper web to the platen. The unit has a sprocket wheel for feeding the paper web, and a paper holder rotatably mounted on a case so as to hold the paper web on the sprocket wheel... | 01/20/1987 |
| 4619389 | Paper tractor A paper tractor feeds print paper along the outer peripheral surface of a platen with sprocket pins fitted in feed holes in the print paper. The paper tractor device which includes ring pin tractors each composed of a wheel having the sprocket pins on its... | 10/28/1986 |
| 4394949 | Pin wheel feed mechanism A pin wheel feed mechanism for transporting documents having feed perforations along the marginal edges thereof. The mechanism includes a pair of symetrically constructed guide frames, each adapted for use on either marginal edge of the feeding document. ... | 07/26/1983 |
| 4390145 | Magnetic tape handling apparatus Apparatus for handling a perforated magnetic film (1) in synchronism with other video/audio film equipment comprises winding spools (61, 62), a head-carrier (5), a capstan drive (2) which provides the effective tape drive during normal operation, a sprock... | 06/28/1983 |
| 4337884 | Single facer A hollow pressure member is provided adjacent the lower corrugating roll of a single facer to apply pressure for effecting bonding of the corrugated web and the liner web. The pressure member is provided, in the area facing the lower corrugating roll, wit... | 07/06/1982 |
| 4333592 | Apparatus for handling deformable components supported in a matrix A matrix of thin, deformable component elements is advanced by a mechanism so that at least the most immediate element of the matrix is maintained registered and non-deformed during translation. The mechanism includes a circumferentially faceted wheel, wi... | 06/08/1982 |
| 4268068 | Passive seatbelt system A seatbelt system of the type including a seatbelt, a flexible tape having a plurality of holes along its length and which is coupled to the seatbelt to cause the seatbelt to automatically fasten and unfasten from a passenger and a moving means for causin... | 05/19/1981 |
| 4238160 | Media guide The present invention is a guide for use in combination with a printer which includes a frame and a print head that is mechanically coupled to the frame and that is adapted to travel laterally along the front of the frame. The printer also includes a plat... | 12/09/1980 |
| 4174567 | Apparatus for storing and supplying parallel lead electronic circuit elements An apparatus for storing and supplying parallel lead circuit elements that are secured to an elongated web is provided. The apparatus is adapted to supply the parallel lead circuit elements to a mechanism particularly adapted to process and secure the par... | 11/20/1979 |
| 4076160 | Paper and continuous-form feed system for a desk-top printing electronic calculating machine A paper and a continuous-form feed system for a desk-top printing electronic calculating machine comprises a platen, pin elements spaced from the platen and rotatable for driving perforated forms, and a guide support for supporting and conveying the forms... | 02/28/1978 |
| 3958873 | Stationary sprocket guard assembly A sprocket assembly for a motion picture projector and a method of threading and removing film from the sprocket assembly is disclosed. By selected configuration of the sprocket and the stationary sprocket guard, including aligner and keeper portions coop... | 05/25/1976 |