Abstract: A method of making feedstock from material supplied in rolls of flexible sheet material which comprises the steps of creating a pluri-layer web of "n" different layers of sheet material, each layer being selected with regard to some known parameter property of the sheet material whereby the pluri-layer web has an aggregate value of the selected parameter which lies within a chosen range of values of said parameter property. Conveniently the feedstock is created by disintegrating the pluri-layer web to create a mass of comminuted pieces of sheet material.

Abstract: A premix storage hopper for storing a hot, viscous, paste-like mixture containing cellulose dispersed in a solution of tertiary amine oxide and water, comprises a vertical contain having a central shaft rotatable about a vertical axis and carrying stirring members and heating means for heating side walls of the container.

Abstract: A method of creating a comminuted feedstock of wood pulp for use in a processing plant which includes the steps of mounting a plurality of rolls of wood pulp sheet material of a first range of properties in a first roll stand, drawing sheet material off each roll in the first roll stand and laying the sheet materials one on the other to create a first pluri-layer web, withdrawing the first pluri-layer web from the first roll stand and leading it to a cutting area of a shredding mill, acting on the first pluri-layer web in the cutting area with rotating hooked disc cutters to tear platelets from the first pluri-layer web and to pass the torn platelets to an outlet of the shredding mill, pneumatically conveying the torn platelets away from the outlet using a fan with a bladed member rotating in a fan casing, and beating the torn platelets with the bladed member as they are conveyed through the fan casing to separate the torn platelets into pieces torn from the individual layers making up the first pluri-layer w