Abstract: A plurality of different types of book style cassette holders or albums are selectively progressively produced by an in-line operation having stations which can be by-passed and selectively actuated to omit or add steps to produce the different types. The initial steps in the method unwind a relatively rigid or stiff thermoplastic sheet from a roll, successively thermoform the sheet into blanks having a plurality of pairs of adjoining hollow wall album trays in side-by-side relation connected by a flexible spine and surrounded by marginal portions. The blanks are fed successively, hollow face upwardly, through successive stations which apply adhesive and cardboard slabs over the bottoms of the trays. Subsequent stations either deposit individual printed cover sheets onto the blanks, or a continuous cover sheet fed from a roll. Succeeding stations selectively apply individual printed sheets over the continuous cover sheet and a transparent film over the printed sheets.

Abstract: Book style cassette holders or albums are mass produced from sheets of thermoplastics material by unwinding a relatively rigid or stiff thermoplastic sheet from a roll and successively thermal forming the sheet into a plurality of pairs of adjoining trays in side-by-side relation connected by flexible spines and surrounded by marginal portions. The thermal formed areas, preferably composed of two rows of album trays with two sets in each row, are successively severed from the sheet into blanks. Each tray portion of a blank has a bottom surrounded by a hollow peripheral wall with the hollow face of the wall surrounded by a rim providing a pocket. The blanks are fed successively, hollow face upwardly, through a plurality of stations which successively apply adhesive in the pockets, deposit cardboard stiffeners in the pockets, feed a flexible cover sheet and, if desired, a film sheet over all or part of the cover sheet. Printed sheets can also be deposited on the cover sheet and thus covered by the film sheet.

Abstract: A book simulating holder or album for cassettes and the like has a cover with front and rear flaps connected by a wide flexible spine with complementary interfitting trays on the inner faces of the flaps and, if desired, a pocket forming strip overlying the cover secured to the bottom and side edges thereof. The trays are formed from a single sheet of plastics material and a portion of this sheet between the trays overlies the spine of the cover. The plastics sheet is vacuum molded to the desired tray contours. Stiffeners such as cardboard are sandwiched between the bottoms of the trays and the flaps of the cover to rigidify the structure. The cover is also a single sheet of plastics material bonded around its marginal edges to the molded tray sheet and the pocket forming strip is simultaneously bonded to the cover.

Abstract: A book simulating holder or album for cassettes and the like has a cover with front and rear flaps connected by a wide flexible spine with complementary interfitting trays on the inner faces of the flaps and, if desired, a pocket forming strip overlying the cover secured to the bottom and side edges thereof. The wide spine bows outwardly into an attractive closed book front end and tightens the pocket forming strip when the trays are in their stacked closed position. The trays are formed from a single sheet of plastics material and a portion of this sheet between the trays overlies the spine of the cover. Stiffeners such as cardboard are sandwiched between the bottoms of the trays and the flaps of the cover to rigidify the structure. The cover is also a single sheet of plastics material bonded around its marginal edges to the molded tray sheet and the pocket forming strip is simultaneously bonded to the cover.