Method for protecting a converting unit for converting a web substrate, feeding station and packaging production machine

Abstract

A method for protecting a unit for converting a web substrate to limit a jam of the substrate ( 3 ) inside the unit ( 2 ), the unit converting the substrate when the unit is stopped, in a packaging production machine: the steps of: detecting at the outlet of the unit that the converted web does not come out; stopping a motor of an infeed arrangement to prevent the substrate from entering the unit; stopping a motor of a feathering drive; and simultaneously stopping the machine.

1 . A method for protecting a unit for converting a web substrate in order to limit a jam of the substrate inside said unit, wherein said unit converts the substrate when the substrate is stopped, wherein said unit is in a packaging production machine;
 the method comprising successive steps of:   detecting at an outlet of said unit that the converted substrate does not exit said outlet;   stopping a motor driving a substrate infeed arrangement to prevent the substrate from entering said unit at said infeed arrangement;   stopping a motor driving a feathering drive that advances said web from said infeed arrangement toward said unit outlet, and simultaneously stopping said machine.   
     
     
         2 . A method according to  claim 1 , further comprising calculating a waiting time between said step of stopping said motor of said infeed arrangement and said step of stopping said motor of said feathering drive. 
     
     
         3 . A method according to  claim 1 , further comprising at the same time as stopping said motor of said infeed arrangement and before said step of stopping said motor of said feathering drive, additional steps comprising stopping a motor of a loop control for said web which is then advancing, and placing said loop control in a parking position not advancing said web. 
     
     
         4 . A method according to  claim 1 , further comprising after said step of stopping said motor of said infeed arrangement and before said step of stopping said motor of said feathering drive, an additional step comprising guiding said substrate toward an accumulation device. 
     
     
         5 . A station for feeding a converting unit with a web substrate, the converting unit being configured for converting the substrate when the substrate is stopped, the station comprising a feathering drive for selectively advancing or permitting halting advance of said substrate, a loop control operable to maintain web tension on said advancing substrate and an infeed arrangement for entry of the substrate into said unit, an accumulation device for said substrate as said infeed arrangement is stopping and before said feathering drive is stopped. 
     
     
         6 . A station according to  claim 5 , further comprising a mechanical device for guiding the substrate toward the accumulation device and the accumulation device being positioned for receiving the web substrate advancing as said infeed arrangement is stopping and before said feathering drive is stopped. 
     
     
         7 . A station according to  claim 5 , further comprising a mechanical barrier positioned for preventing said substrate from moving into said station and off a path toward said converting unit. 
     
     
         8 . A station according to  claim 5 , further comprising from upstream to downstream, a lateral web guide, a dancer roller, a web decurler, the feathering drive, a pressing roller, the loop control and the infeed arrangement. 
     
     
         9 . A packaging production machine comprising:
 a unit for converting a substrate and operable to convert the substrate when said substrate is stopped;   a station for feeding said unit with said substrate, said station having a feathering drive and an infeed arrangement for advancing said web to said station;   a jam detector positioned at an outlet of said unit configured for sending a jam signal corresponding to a jam of said substrate inside said unit; and   a device for processing the jam signal and configured to generate stop signals respectively for said infeed arrangement, for said feathering drive, and for said machine.   
     
     
         10 . A machine according to  claim 9 , wherein said unit is a diecutting platen press.