(19)
(11) EP 0 042 051 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.02.1982 Bulletin 1982/06

(43) Date of publication A2:
23.12.1981 Bulletin 1981/51

(21) Application number: 81102750

(22) Date of filing: 10.04.1981
(84) Designated Contracting States:
DE FR GB

(30) Priority: 16.06.1980 US 159881

(71) Applicant: International Business Machines Corporation
 ()

(72) Inventor:
  • Herman, Richard Louis
     ()

   


(54) Powder dispensing apparatus with metering roll


(57) A powder dispenser comprises a container (16) having therein a rotatable metering roll (32) which is engaged by lower wall portions (40) and (50) to provide a surface portion exposed below the container. A metering portion of the roll (45) entraps powder as the roll rotates past wall (40) to dispense it by gravity from the dispenser as the portion leaves wall (40). The roll is either eccentrically .mounted as shown, or has a non-circular cross section in order to vibrate the powder in the container as the roll rotates. This reduces powder caking.






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