US 4031586 A abstract this invention pertains to insoles and lasts for footwear the insole has one or several protrusions which fit correspondingly disposed cavities in the outer sole thus assuring correct alignment of the outer sole and the insole at assembly lasting hooks are located around the insole which help to improve string lasting and make possible a novel lasting method in conjunction with holes in the lasting margin of the upper the last has two registration pins one of them is firmly the other one resiliently located in its bottom they assure accurate positioning of the insole against the bottom of the last and eliminate the use of tacks application_number US 63882775 A description the illustrative insole 10 as shown in fig1 and fig2 has a protrusion 12 which fits snugly in the cavity 32 of the outer sole 30 thus assuring correct alignment of the outer sole 30 against the bottom of the lasted shoe the protrusion 12 can have various shapes and will not only serve as an alignment pin but will also favorably effect the stability and rigidity of the heel of the outer sole 30 it is very well possible to cement the protrusion 12 in the cavity of the outer sole so that a separation of the heel and the insole 10 becomes almost impossible the insole 10 in fig1 to 4 has a shank reinforcement rib 14 which is integrally molded to the insole the insole 10 is molded in such a way that the reinforcement rib 14 does not have any sharp corners or notches thus avoiding stress concentrations when the shoe.