Patent ID: 8282032
Filing Date: 2012-10-09
Classification: B65H

Abstract:
1. A pre-wound sheet cut-off mechanism for a thin material sheet winding device, comprising: a first winding roller supported by a shaft to be rotatable in a predetermined direction; a plurality of curved guide plates arranged at a predetermined distance below the first winding roller to form a curved-guide-plate channel therebetween, the curved-guide-plate channel having a core loading end and a core unloading end, the curved guide plates being distributed and spaced from each other by a predetermined distance along an axial direction of the shaft; a plurality of pre-winding plates individually coupled between adjacent curved guide plates; a second winding roller arranged at a location close to the core unloading end of the curved-guide-plate channel; and a rider roller arranged above the core unloading end of the curved-guide-plate channel, wherein a winding nip is formed between the first and second winding rollers; wherein in a winding operation, a core applied with an initial glue is introduced into the curved-guide-plate channel through the core loading end, and a thin material sheet is stretched against and conveyed by the first winding roller to wind about the core, the core being transported by the first winding roller through the curved-guide-plate channel to the winding nip to carry out the winding operation, whereby a thin material sheet roll is formed about the core upon finishing the winding operation, and wherein winding speed of the thin material sheet roll is reduced as a next core introduced into the curved-guide-plate channel reaches the pre-winding plates to generate slack in the thin material sheet, a portion of the thin material sheet being thereby released to fall away from the first winding roller and pre-wind about the next core; wherein according to a torque brought from rotating the next core, the slack in the thin material sheet is taken up by continued pre-winding about the next core, and a tension on the thin material sheet increases until the thin material sheet is torn apart.