Method and device for controlling the vacuum in a succession of suction conveyors
AssigneeSasib S.p.A.
InventorGian L. Gherardi
Life of this patent
Estimating the term…
Abstract
This invention relates to a method and a device for controlling the vacuum in a succession of suction endless conveyors (1 to 6) connected to a single vacuum generator (17), particularly in the machines and plants of the tobacco industry. According to the invention, upon starting, the successive suction conveyors (1 to 6) are connected to the vacuum generator (17) either individually or in groups, by successive steps and progressively in the advance direction (F) of the flow of articles being conveyed. This is accomplished by use of a suitable distributor (18, 118, 24) controlled by a device (21) responsive to the advance of the leading end of the flow of articles being conveyed.
Claims5
An apparatus for conveying articles comprising:
- a succession of endless conveyors, the articles being individually held by suction on one said conveyor and then transferred to a succeeding said conveyor, each said conveyor including suction holes and a suction chamber to which said suction holes are successively connected for a predetermined fraction of a cyclic movement of said conveyor to hold the article to said conveyor during that fraction of movement;
- and
- a vacuum generating means for generating a vacuum for each of said suction chambers and including a distributor means for distributing the vacuum to each said suction chamber and a control means for sensing a leading end of a flow of the articles upon a starting of the conveying of the articles and for connecting at least one said suction chamber through said distributor means to said vacuum generating means by a successive step and progressively just in advance of a receipt by the associated said at least one said conveyor of the leading end of the flow of the articles.
Dependencies are inferred from the claim text.