AUTOMATIC MEASURING, CUTTING AND ROLLING MACHINE FOR WEBS OF PAPER OR THE LIKE

• US 3,558,070 A
• Filed: 11/29/1968
• Issued: 01/26/1971
• Est. Priority Date: 09/02/1967
• Status: Expired due to Term

• Current Assignee: Gabriels Leonard
• Original Assignee: Gabriels Leonard
• Inventors: GABRIELS LEONARD
• Application Number:
  US04/780,010
• Time in Patent Office: 788 Days
• US Class Current: 242/523.1
• 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 2220/03 indicating an entity which is measured, estimated, evaluated, calculated or determined but which does not constitute an entity which is adjusted or changed by the control process per se
• CPC Class Codes: B65H 2511/11 Length

Abstract

An automatic web-measuring, cutting and rolling-up machine of the type having cutting mechanism disposed transversely of the web during its passage from one to the other of two pairs of driven rollers, the second of which pairs delivers said web to deliver said mechanism including a roller-carrying gate adapted for automatic displacement as the diameter of the roll of web increases and for subsequent positive displacement to discharge the finished roll, is characterized in that the winding speed of the machine and the operation of the cutting mechanism are automatically controlled through the medium of a measuring unit driven directly or indirectly by the incoming web, and preferably including cam-operated switches which respectively control electromagnetic clutch means for driving the first and second pairs of rollers and electrical means for causing actuation of the cutting and gate-opening mechanism during each operating cycle of the machine.

Claims

1. A machine for automatically measuring, cutting-off and rolling-up predetermined lengths of web material, comprising first and second pairs of driven rollers successively engaging said web so as respectively to wind in and carry forward the same measuring means driven by the incoming web, cutting means disposed transversely of said web between said first and second rollers, means for rolling-up each cut length of web delivered thereto by said second rollers and automatically discharging the finished roll, said measuring means controlling the winding speed of the machine and the operAtion of said cutting means, electromagnetic clutches for driving said first and second pairs of rollers, electrical means for causing actuation of said cutting means and for discharging a roll from said rolling-up means during each operating cycle of the machine, and cam operated switches operated by said measuring means for controlling said clutches and electrical means.

2. A machine as claimed in claim 1, wherein said electromagnetic clutches for driving said first and second pairs of rollers and energized in turn so that said first pair of rollers are driven at high and low speeds respectively, and including a freewheel device through which said second pair of rollers is normally driven from said first pair, and a driving connection between said second pair and said cutting means whereby, during each period of low-speed rotation, said second pair are momentarily accelerated immediately after severance of said web by said cutting means, the latter including a rotary knife adapted to make a single revolution at low speed when released by said electrical means.

3. A machine as claimed in claim 1, wherein said measuring means includes a shaft indirectly friction-driven from one of said first pair of rollers, and two cams mounted on said shaft for operating said switches, one such cam being adjustable in length to control the period for which said first pair of rollers is driven at low speed in each cycle of operations, and the other such cam being angularly adjustable relative to said one cam to control the instant of operation of said cutting means.

4. A machine as claimed in claim 1, and wherein the rolling-up mechanism comprises two coacting sets of rollers, a movable gate carrying one such set and serving continuously to urge them towards said other set, a housing connected to said gate, two acting wedge-blocks contained in said housing, one such wedge-block being continuously urged towards the other, and an eccentric for periodically advancing the other such wedge-block in timed relation to the operation of said cutting means, the positive movement of said housing produced by wedging of said blocks within it causing release of a roll of web formed between said sets of rollers and being unaffected by the extent to which said housing has already been displaced by expansion of said roll.

5. A machine as claimed in claim 1, in combination with web-supply means comprising a fixed frame, a second frame pivoted at one end about an axis transverse to the direction of web movement towards said machine, a first set of equally-spaced rollers mounted transversely of said fixed frame, a second set of equally spaced rollers mounted transversely of said pivoted frame at such positions as to be capable of movement between and above the rollers of said first set, said web being passed between said sets of rollers during disposal of the same as aforesaid and being subjected to substantially constant tension when supporting the weight of said pivoted frame, whose angular position depends upon the winding speed of said machine.