Loading patent…
AssigneeContinental Can Company, Inc.
InventorsKenneth W. Rarey, Edward D. Higgins, Donald L. Hungerford, John B. Kennedy, Jr.
Estimating the term…
Electrostatic printing or coating apparatus including a main drum for transporting developer mix to an application or printing zone and having permanent magnet segments mounted within the drum for attracting developer mix to its exterior surface. An electric field is produced in the printing zone to provide movement of developer particles toward the article to be printed or coated and a field producing electrode is mounted within the drum adjacent the printing zone. A container conveyor extends past the printing zone to provide positioning of container portions to be coated, and a further drum having interior permanent magnet segment is positioned to remove developer mix from the main drum. The further drum may be rotated in the rotational direction opposite that of the main drum to reduce developer turbulence. Removal of the developer mix from the apparatus may be effected by a member pivotally mounted to open an aperture and having an edge engageable with a movable developer mix carrying member to provide diversion of the mix through the aperture.
Electrostatic printing or coating apparatus for electrostatically depositing toner on portions of continuously conveyed articles comprising means for conveying articles along a predetermined path of travel through a toner application zone, means for transporting toner through said toner application zone, means for electrostatically propelling said toner in said toner application zone from said transporting means to articles conveyed along said path of travel, means defining an elongated narrow opening in said toner application zone between said transporting means and said conveying means whereby only the propelled toner passing through said opening is deposited upon said articles, the longitudinal axis of said opening is disposed in generally parallel relationship to said path of travel, said transporting means includes an endless moving surface upon which is supported said toner, and a portion of said endless moving surface is disposed adjacent said narrow opening and moves past said narrow opening in a direction transverse to the longitudinal axis thereof.
Electrostatic printing or coating apparatus including means for transporting toner composed of toner particles carried by magnetic carrier particles to a toner application zone, means for electrostatically applying said toner particles to at least a portion of an article in said toner application zone, means for establishing an dectric field in said toner application zone for propelling said magnetic carrier particles in a divergent fashion from said transporting means toward an article, and means for reducing the divergence of the magnetic carrier particles during the propulsion thereof toward an article.
Electrostatic printing or coating apparatus for electrostatically depositing toner on portions of continuously conveyed articles including conveying means for conveying said articles along a predetermined path, means for transporting toner particles into an application zone proximate said path, means for electrostatically applying said toner particles to said portions of articles including opening means communicating between said transporting means and said path for the passage of toner particles therethrough, said communicating means between said transporting means and said path including an elongagted opening lying parallel to said path for defining the portions of the articles to be coated, said transporting means including a movable member having a portion thereof for carrying toner particles on a surface thereof proximate said opening means, magnetic means proximate said movable member for effecting the locating of toner particles on said surface of said movable member, means defining a housing for said transporting means, cleaning means comprising doctor blade means movable into the path of movement of toner particles within said housing, means movable to define a toner particle removal opening through said housing, and said doctor blade means being positioned for diverting said toner particles through said particle removal opening.
Dependencies are inferred from the claim text.