Binder for data carrier holders

Claim 1

A binder comprising a substantially rectangular flat front cover member, a substantially rectangular flat rear cover member, and a back member hingedly connecting said front cover member and said rear cover member along adjacent edges thereof, data carrier holders mounted at said back member by means of guide rails disposed at those back member edges which are not hingedly connected to said front cover member or said rear cover member, said guide rails being provided with straight grooves facing each other, rod means being provided at that data carrier holder edge which, when mounted at said back member, is adjacent thereto, said rod means extending beyond said holder edge and having end portions slidingly and pivotably received in said grooves, the number of data carrier holders mounted in said rails by means of said rod end portions being sufficiently small to leave a substantial amount of the guide rail length unoccupied for sliding movement of said end portions, each data carrier holder comprising a pocket member folded of resilient plastic film and having a substantially rectangualr rear wall and two lateral front flaps whose opposing edges are spaced from each other, said front flaps being provided with score lines such that the flaps are biased away from said rear wall, said rod means axis being substantially perpendicular to said opposing flap edges, the bias of all flaps facilitating unfolding of said binder between two adjacent holders.