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The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 4469429 | Electrophotographic reproducing machine An electrophotographic reproducing machine in which the bias voltage applied to the sleeve is set at such a level as to substantially nullify the developing current which is produced as a result of induction of charge in the developer in accordance with t... | 09/04/1984 |
| 4434221 | Toner concentration detection by measuring current created by transfer of carrier component to non-image areas of image support surface An improved toner concentration detection and control method to be applied to an electrophotographic copying apparatus or the like which is so arranged that, part of an electrostatic latent image support member outside its image region is utilized as a ca... | 02/28/1984 |
| 4390265 | Image forming apparatus An imaging forming apparatus in which a photosensitive member is electrostatically charged and the charged area is exposed to light to form a latent image which is subsequently developed to obtain an image the apparatus being featured in that the imaging ... | 06/28/1983 |
| 4348100 | Control for xerographic system A combination xerographic/flying spot scanning apparatus wherein xerographic images produced by the xerographic section are scanned following development by the scanning beam of the scanning section to produce image signals or pixels representative of the... | 09/07/1982 |
| 4343548 | Control system for regulating the concentration of toner particles within a developer mixture An apparatus which regulates the developability of a conductive developer mixture by controlling the concentration of toner particles therein. The concentration of toner particles in the developer mixture is adjusted in response to the sensed conductivity... | 08/10/1982 |
| 4319544 | Digitally synthesized dynamic bias method and apparatus for toning control in developing latent electrophotographic images In an electrophotographic image forming process, a method and apparatus for providing an electric toning bias wherein the instantaneous electric potential value of the bias is changed with time in proportion to the natural decay of the resident electric c... | 03/16/1982 |
| 4314755 | Bias voltage controlled developing system in an electrophotographic copying machine An electrophotographic copying machine is disclosed comprising an image formation section for forming an electrostatic latent image on a photosensitive drum, and a magnet brush developing unit for developing the electrostatic latent image through the use ... | 02/09/1982 |
| 4304486 | Automatic bias and registration control system for electrophotographic copier In an optical imaging system for an electrophotographic copier, a photodetector intercepts a portion of unfocused light being reflected toward the photoconductive surface. An electronic circuit generates a biasing voltage for the copier development electr... | 12/08/1981 |
| 4257347 | Process and apparatus for electrophotographic development of latent images on sheet-like carriers The intensity of development of latent images on dielectric receptor sheets in a liquid bath which contains a dispersion of toner particles and fills a vessel between two electrodes one of which supports a sheet in such a way that the latent image faces t... | 03/24/1981 |
| 4190018 | Powder density control circuit for a photocopier A powder density control means is provided for use in a photocopier machine of the type in which a photoconductor is charged in accordance with an image to be recorded thereon and is developed by contact with a toner powder attracted thereto from a mixtur... | 02/26/1980 |
| 4168329 | Auto-bias developing process and an electrophotographic copying machine An auto-bias developing process for developing an electrostatic latent image formed on a photosensitive member which includes the step of storing a detected potential in order to apply a fixed bias potential to a developing electrode plate wherein the sur... | 09/18/1979 |
| 4149796 | Electrophotographic apparatus comprising improved bias source for magnetic brush A photoconductive sheet is wrappingly attached to an electrically conductive, grounded rotary drum so that part of the drum is covered by the sheet and another part of the drum is exposed. A magnetic brush developing member comprises a magnetic core and a... | 04/17/1979 |
| 4128329 | Apparatus for producing bias voltage for use in electrophotographic copying machines An apparatus for producing a bias voltage for use in an electrophotographic copying machine including a developing electrode, which apparatus assures a bias potential of a proper magnitude in response to a variation in the amount of light emitted by a lig... | 12/05/1978 |
