(19)
(11) EP 0 109 303 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.11.1984 Bulletin 1984/45

(43) Date of publication A2:
23.05.1984 Bulletin 1984/21

(21) Application number: 83306944

(22) Date of filing: 14.11.1983
(84) Designated Contracting States:
CH DE FR GB LI

(30) Priority: 15.11.1982 US 441864

(71) Applicant: REDLAND PRISMO CORPORATION
 ()

(72) Inventors:
  • Mark, Gary L.
     ()
  • Wands, Kenneth
     ()

   


(54) Apparatus for and method of controlling rate of deposition of material from a moving vehicle


(57) Apparatus for and method of spraying a substance such as paint onto a road surface or the like to form a coating of uniform thickness in which the speed of the vehicle (10) mounting the system is detected and a speed signal produced which controls air flow through a variable flow air valve (34) to a diaphragm air pump (50) which supplies paint or other substance to a spray gun (22, 24). The speed is detected by a road wheel (40) which feeds a train of pulses to a frequency to D.C. converter (39). The converter (39) produces an electrical signal which controls a transducer (44) for controlling the variable air valve (34).






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