Winder assembly and method of use thereof

A method for changing cores on a winder assembly, comprising:

• providing a turret assembly including a first core and at least one second core mounted for rotation on the turret assembly, the first core having a web of sheet-type work material winding there around;
• providing a lay-on roll assembly pivotally mounted to a frame, at least one lay-on roller mounted to the lay-on roll assembly;
• providing an enveloper assembly including at least one pivot arm coupled to the frame, the enveloper assembly further including at least one second pivot arm pivotally coupled to the at least one first pivot arm, at least one pivot roll side plate pivotally coupled to the at least one first pivot arm and the at least one second pivot arm and a nipping pivot roller rotatably coupled to the pivot roll side plate;
• the method further includes, in the following order:
• a first step of moving the lay-on roll assembly to a retracted position wherein the at least one lay-on roller is tilted off of and away from the work material wound onto the first core or the at least one second core;
• a second step of causing the turret assembly to index the first core onto a roll removal position and one of the at least one second core into a winding position;
• a third step of moving the enveloper assembly to an operating position and moving the at least one pivot roll side plate to a working position so that the nipping pivot roller rolling engages the one of the at least one second core;
• a fourth step of cutting the web of sheet-type work material to separate the work material from the work material wound onto the first core, thereby creating a work material tail portion;
• a fifth step of moving the pivot roll side plate circumferentially around the one of the at least one second core to a web feeding position causing the pivot roller to engage the work material tail portion;
• and
• simultaneously with the fifth step, or between the fourth step and the fifth step, moving the lay-on roll assembly to an engaged position wherein the work material tail is fed into a nip formed between the one of the at least one second core and the at least one lay-on roller;
• and
• further providing biasing means coupled to and rotatable with the pivot roll side plate;
• rotating the biasing means in a first direction urging the spring against the sleeve thereby urging the sleeve against a portion of the nipping roller;
• and
• urging the nipping pivot roller against the work material and the first core in response to the pivot roll side plate being in the working position.