Method for controlling the flow of a product onto a conveyor belt

{
  "publication_number": "US4748029A",
  "country": "US",
  "kind": "A",
  "title": "Method for controlling the flow of a product onto a conveyor belt",
  "abstract": "In a method for controlling the flow of a pumpable food product into an apparatus comprising a conveyor belt to which the product is applied and converted from liquid to solid phase, the angle of spreading of the product applied to the conveyor belt is sensed and compared with a predetermined angle of spreading. The flow of product is so controlled that the difference between these angles is reduced. An apparatus for carrying out the method includes a horizontal belt conveyor having a conveyor belt for treating a web or mat of a pumpable product which is applied to the belt and spread over its entire width. A detector senses the angle of spreading of the product on the belt, and a control unit controls the flow of product applied such that the angle of spreading will have a predetermined value.",
  "claims": [
    "1. Method for controlling the flow of a pumpable food product into an apparatus comprising a substantially horizontal belt conveyor having a conveyor belt for converting into a solid state a web or mat of said pumpable food product which is applied from a nozzle to a belt and spreads across the entire width thereof, wherein the angle of the spreading from the location of the nozzle of the food product on the conveyor belt is sensed and compared with a predetermined angle of spreading, and wherein said flow of said pumpable food product is so controlled that the difference between said two angles is reduced.",
    "2. Method as claimed in claim 1, wherein the flow from the nozzle is controlled by stepwise adjustment thereof.",
    "3. A method of controlling the flow of a pumpable food product onto a moving conveyor belt whereupon said food product is frozen into solid form, comprising: discharging said pumpable food product onto the belt at approximately the center thereof while simultaneously moving said belt relative to the location of such discharging; permitting said pumpable food product to spread across the entire width of said moving belt; sensing the position of a spreading front of the pumpable food product as it spreads across the width of said belt and as said belt moves away from the location of said discharging; and controlling the rate of discharging based on the sensed location of the spreading front of the pumpable food product on the moving belt."
  ],
  "cpc": [
    "A23B 2/80",
    "F25D 13/06",
    "G01N 33/02"
  ],
  "assignees": [
    "FRIGOSCANDIA CONTRACTING AB"
  ],
  "filing_date": "1986-06-19",
  "publication_date": "1988-05-31",
  "grant_date": "1988-05-31",
  "priority_date": "1985-06-26",
  "application_number": "US-87670286-A",
  "family_id": "20360702",
  "citations": [
    "EP0061922A2",
    "US3253420A",
    "US3628726A",
    "US3776460A",
    "US4064295A"
  ]
}