Loader for signatures, sheets and similar products, for the feeders of packaging machines, bookbinding machines and the like

摘要

A loader for box-type feeders of packaging machines, bookbinding machines and the like, in which the products are loaded into a feed channel with an inclined base formed by a conveyor belt, to be brought into contact with a counteracting plate. Sucker arms cyclically withdraw one product at a time and transfer it to wheels provided with grippers which insert the product between pairs of belts by means of which the product is transferred until it discharges into the feeder box. Feeler elements cyclically determine the thrust of the products in the feed channel and enable the conveyor belt to advance through one step when the thrust is smaller than a predetermined value, whereas they prevent said advancement when the thrust is greater than said value.