WEB FEEDING APPARATUS

• US 3,844,189 A
• Filed: 05/15/1973
• Issued: 10/29/1974
• Est. Priority Date: 05/03/1973
• Status: Expired due to Term

• Current Assignee: Robert W. Jardine
• Original Assignee: Robert W. Jardine
• Inventors: Jardine, Robert W.
• Primary Examiner(s): Abercrombie, Willie G.
• Application Number:
  US05/360,494
• Time in Patent Office: 532 Days
• Field of Search: 83/98,99,102,402 226/97 271/195
• US Class Current: 83/98
• CPC Class Codes: B21C 47/34 Feeding or guiding devices not specially adapted to a particular type of apparatus
• CPC Class Codes: B21C 47/3441 Diverting the leading end, e.g. from main flow to a coiling device
• CPC Class Codes: B21C 47/3475 Fluid pressure or vacuum
• CPC Class Codes: B65H 19/2238 The web roll being driven by a winding mechanism of the nip or tangential drive type B65H19/2276 takes precedence
• CPC Class Codes: B65H 19/26 Cutting-off the web running to the wound web roll
• CPC Class Codes: B65H 23/24 by fluid action, e.g. to retard the running web
• CPC Class Codes: B65H 2301/448 Diverting
• CPC Class Codes: Y10T 83/2066 By fluid current
• CPC Class Codes: Y10T 83/2074 Including means to divert one portion of product from another
• CPC Class Codes: Y10T 83/6472 By fluid current

Abstract

Web feeding apparatus including a web diverting device which is controllable to cause a free leading end of a web to take a selected one of two alternative paths. The web diverting device comprises a pair of facing surfaces which diverge from each other in the web feeding direction whereby each defines a respective one of the two alternative paths. Air feed devices are arranged to direct a flow of air over either one of said surfaces as selected in the direction of web feed, to draw the web to that surface.

Claims

1. Web feeding apparatus including a web diverting device which is controllable to cause a free leading end of a web to take a selected one of two alternative paths, the web diverting device comprising a pair of facing surfaces which diverge from each other in the web feeding direction whereby each defines a respective one of the two alternative paths, the facing surfaces of the diverting device extending substantially parallel to each other for a length before they commence to diverge, and means for directing a flow of air over either one of said surfaces as selected in the direction of web feed, whereby the free leading end of a web passing between the facing surfaces is drawn to the one of the surfaces over which the flow of air is directed, the means for directing the flow of air over the facing surfaces comprising air feed devices respectively disposed in each of said facing surfaces part way along their substantially parallel portions, and web severing means positioned to sever the web substantially at the commencement of the divergence of said facing surfaces.

2. Web feeding apparatus according to claim 1, wherein the web severing means comprise a pair of web severing blades, each arranged to be moved from an inoperative position behind a respective one of the facing surfaces to a position in which it projects through the facing surface to sever the web.

3. Web feeding apparatus according to claim 2, wherein the diverging portions of said facing surfaces each define together with a further surface a web guiding throat and each of said blades in its projecting position closes the adjacent throat.

4. Web feeding apparatus according to claim 2, wherein control means are provided for controlling the air feed devices and the web severing blades so that upon movement of one blade so that it projects through one of said facing surfaces to sever the web, the air feed device associated with the other surface is caused to supply a flow of air over said other surface.