Patent ID: 6499273
Filing Date: 2002-12-31
Classification: B65B

Abstract:
A machine for making filter bags containing a product for infusion, having a pick-up tag connected to the top of the filter bag by an intermediate thread, said machine comprising a wheel which rotates with a stepping motion about its own axis of rotation, being equipped with grippers, the wheel bringing the grippers into contact with a series of operating stations, comprising at least one station for folding a tubular semi-finished product containing the product for infusion, and at least one station for knotting the thread, the machine further comprising thread feed means which operate on the thread fed between pairs of the grippers positioned one after another along the edge of the wheel; said feed means presenting a fork with extended teeth angled parallel with the axis of rotation of the wheel, the fork being supported by an arm which oscillates between a home position, in which the teeth are outside the wheel, and an operating position, in which the teeth are between two consecutive grippers on the wheel.