Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 5484680 | Magnetic brush developing method The developing method of the present invention is carried out by providing a developing means comprising a non-magnetic sleeve and a permanent magnet member stationary inside the non-magnetic sleeve at a position opposing an image-bearing member having an... | 01/16/1996 |
| 4811187 | DC-DC converter with saturable reactor reset circuit A DC-DC converter having a transformer having a primary winding and a secondary winding; means for supplying DC input voltage to the primary winding; at least one switching element connected between the DC input voltage supplying means and the primary win... | 03/07/1989 |
| 4721153 | High-chromium compound roll A compound roll for rollng composed of a shell made of high-chromium cast iron and a core made of cast or forged steel. The shell has a large residual compressive stress. The high-chromium cast iron shell has a composition by weight of 2.0-3.5% C, 0.5-1.5... | 01/26/1988 |
| 4436055 | Developing apparatus A developing apparatus includes a rotatable photosensitive drum having a peripheral surface carrying an electrostatic latent image to be developed. A plurality of developing rolls are disposed in opposition to the photosensitive drum, with developing gaps... | 03/13/1984 |
| 4194932 | Fe/Cr/Co Permanent magnetic alloys and method of production thereof Fe/Cr/Co alloys of this invention which are provided with both a good workability and maximum energy product of 2.0 MGOe or more, consist of 17 to 45% by weight of chromium, 3 to 14.9% by weight of cobalt and the remainder being essentially of iron, which... | 03/25/1980 |
| 4176539 | Cold-roll forming stand A cold-roll forming stand for forming a flat metal strip into a desired section which includes a pair of upper and lower forming rolls for forming the metal strip lengthwise; a pair of intermediate longitudinal forming rolls for bending or curving the met... | 12/04/1979 |
| 4060892 | Cutter for semicylindrically curled paper A cutter, simple in construction but having good cutting quality and durability, for cutting paper in a semicylindrically curled state. With radii equal to or approximate to the radius of curvature of the paper to be cut, a stationary blade having a semic... | 12/06/1977 |
| 4058650 | Back material of metal band saw high in fatigue strength A back material of a metal band saw high in fatigue strength which consists essentially of, by weight, 0.20 - 0.33% C, up to 1.5% Si, up to 1.5% Mn, 3.5 - 6.5% Cr, 0.05 - 0.40% V, 0.05 - 0.10% Al, 0.02 - 0.30% Nb, at least one of 1.0 - 3.0% Mo and up to 4... | 11/15/1977 |
| 4058037 | Full rotation type, sheet web shearing machine A full rotation type, sheet web shearing machine comprising a rotary blade with a shearing edge, a stationary blade with a shearing edge, a motor for driving and braking the rotary blade, a cam for detecting a rotation angle of the rotary blade and gears ... | 11/15/1977 |
| 4032302 | Carbide enriched high speed tool steel A carbide enriched high speed tool steel having good toughness, excellent wear resistance and excellent cutting endurance which by weight consists essentially of 0.62 - 3.95 % of carbon, totally 24 - 50 % of tungsten and twice amount of molybdenum, 3.0 - ... | 06/28/1977 |
| 4021232 | Cast iron melting process A cast iron melting process comprising the steps of charging recarburizer in the lower portion of an electric arc furnace, charging iron scraps, and charging oxidizing slag-forming agents and/or sponge irons, and/or blowing oxygen therein to make oxidizin... | 05/03/1977 |
| 4021272 | Method of isothermal annealing of band steels for tools and razor blades A method consisting in converting a coil of hot-rolled band steel for tools and razor blades into an open coil in which its convolutions are spaced apart from one another, and immersing the open coil in a series of salt baths. First of all, the open coil ... | 05/03/1977 |
| 4006015 | Ni-Cr-W alloys The present invention provides Ni-Cr-W alloys consisting essentially of, by weight, 0.001 - 0.1% carbon, 0.05 - 0.7% titanium and/or niobium, 18 - 25% chromium and 16 - 22% tungsten, the total content of chromium plus tungsten being from 38 to 44% and the... | 02/01/1977 |
| 4000010 | Roll and process for producing same A roll and process for producing same are disclosed. This process includes the steps of: horizontally placing a core body made of a cast steel or a steel based Adamite containing from 0.5 to 2.5 %C, said core body having one or more circumferential groove... | 12/28/1976 |
| 3997371 | Permanent magnet A permanent magnet made of a sintered product consisting essentially of a cobalt-samarium-heavy rare earth elements alloy having a lower reversible magnetization temperature coefficient than that of a cobalt-samarium alloy.... | 12/14/1976 |
| 3989556 | Semihard magnetic alloy and a process for the production thereof The semihard magnetic alloy of the present invention consists essentially of, by weight, 17 % to 45 % chromium, 3 % to 14 % cobalt, 0.2 % to 10 % titanium and balance substantially iron and has a residual magnetic flux density of 7,000 Gauss or more and a... | 11/02/1976 |
| 3989090 | Core supply system for metal founding Core conveyor means of the endless type moving synchronously or non-synchronously with one or more continuous casting devices is disposed in side-by-side relation with the continuous casting device or devices, and the conveyor means is moved in the same d... | 11/02/1976 |
| 3989089 | Hollow core molding device for use in shell mold A hollow core molding device for use in a shell mold is disclosed, which device uses for molding a hollow core a permanent mold which is parted into a top part and a bottom part in the horizontal direction. This molding device includes a sand container ha... | 11/02/1976 |
| 3982972 | Semihard magnetic alloy and a process for the production thereof The semihard magnetic alloy of the present invention consists essentially of, by weight, 17 to 45 % chromium, 3 to 14 % cobalt, 0.2 to 5 % silicon and balance substantially iron, preferably 23 to 35 % chromium, 6 to 12 % cobalt, 0.3 to 3 % silicon and bal... | 09/28/1976 |
| 3978911 | Tilting centrifugal casting machine A tilting centrifugal casting machine for producing a compound solid roll by centrifugally casting the outer shell and inner layer into an integral structure. The angle of inclination of the axis of rotation of the mold and the angle defined by the line c... | 09/07/1976 |
| 3977463 | Inclined type centrifugal casting apparatus In inclined type centrifugal casting apparatus for producing cylindrical castings, such as rigid rolls, or hollow cylindrical castings, such as thick sleeves, an axial component of force of a rotating molding box is so great as to require being supported ... | 08/31/1976 |
| 3968551 | Adamite roll containing cobalt An steel based Adamite roll containing, in weight percent, from 1.0 to 2.2 percent C, from 0.5 to 0.8 percent Si, from 0.5 to 0.8 percent Mn, from 0.5 to 1.0 percent Ni, from 1.0 to 2.0 percent Cr, from 0.1 to 1.0 percent Mo and from 0.5 to 2.0 percent Co... | 07/13/1976 |
| 3959930 | Apparatus for cutting off cast parts from a runner of a casting body An apparatus for cutting off cast parts from a cylindrical runner of a casting body comprises a slidable mount supported on a bed, holding means provided on the slidable mount for supporting and indexing the casting body and a cutting grinder supported up... | 06/01/1976 |
| 3952701 | Electrostatic developing apparatus An electrostatic developing apparatus for developing an electrostatic latent image formed on an electrostatic copy paper according to a magnetic brush developing process is disclosed. In this electrostatic developing apparatus, there is formed a magnetic ... | 04/27/1976 |
| 3951650 | Low carbon, Ni-Cr-Mo system cast iron roll A low carbon, Ni-Cr-Mo system cast iron roll containing, in weight percent, from 1.5 to 2.8% C, from 0.2 to 0.7% Si, from 0.6 to 0.8% Mn, from 2.1 to 3.5% Ni, from 1.8 to 2.5% Cr, from 1.1 to 1.5% Mo, the balance being essentially Fe and a reasonable amou... | 04/20/1976 |
| 3948189 | Pouring ladle and pouring platform car for use therewith A pouring ladle and a platform car for use therewith are disclosed, the aforesaid ladle having a partition wall therein which has a passage adjacent to its bottom for allowing the communication of the melts separated by said wall, said wall being position... | 04/06/1976 |
| 3941590 | Precipitation hardening Ni base alloy Precipitation hardening Ni base alloys comprising not more than 0.2% by weight of C, 17 to 19% by weight of Cr, 3.5 to 4.5% by weight of Mo, 5 to 7% by weight of W, 5 to 15% by weight of Co, 1.75 to 2.25% by weight of Al, 2.0 to 3.5% by weight of Ti, not ... | 03/02/1976 |
| 3937628 | Solid-solution strengthened austenitic alloys Solid-solution strengthened austenitic alloys consisting of, in weight percent, no more than 0.1 % carbon, from 4 (%C) to 1 % titanium and/or niobium (alone or in combination), no more than 75 % cobalt, no more than 26 % chromium, from 8 % to 40 % tungste... | 02/10/1976 |
