公开(公告)号：DE3679205D1

公开(公告)日：1991-06-20

申请号：DE3679205

申请日：1986-01-17

Applicant: IBM

Inventor： BRADY JR ,  JORDAN STANLEY ROBERT ,  MORGADO EUGENIO JOSE ,  PERLINI JULIUS JOSEPH ,  STRICKER ALFRED ALOIS

IPC: B23K20/00 ,  B23K20/04 ,  B31B3/00 ,  B31B41/00 ,  B31B50/30 ,  B31B50/52 ,  B31F1/00 ,  G11B23/03 ,  B31B1/30

Abstract: Centerfold forming apparatus for making an envelope for a plastic disk from a prepunched, flexible, plastic blank having two sections connected at the heads thereof and containing a drive hole at the same location in each section; the flexible plastic material blank (10) is held against two outward surfaces (32,33) of a first and second folding plate (21,23) that are pivoted in the middle (28) so that the plates (21, 23) are driven in an arcuate path until said outward surfaces (32,33) are positioned in vertical planes facing each other; the drive holes in each section of the flexible blank are fitted over respective hubs (35,35 min ) located in the same location in said surface (32,33) of each first and second folding plate (21,23); a mandrel (34) which is extendable vertically and has an edge thereof in the extended position pressing against the blank (10) in the area between the first and second plates pulling the drive holes in the blank taut on said hubs (35,35 min ) thereby locating the centerline of said blank; drive means moving the folding plates (21,23) from the horizontal to the vertical facing position causing said blank (10) to bend along the pressing edge of said mandrel (34) forming the centerfold; heating means are provided for heating the centerfold to a predetermined temperature to anneal the material thereby reducing internal stresses therein.

公开(公告)号：DE3679414D1

公开(公告)日：1991-07-04

申请号：DE3679414

申请日：1986-01-17

Applicant: IBM

Inventor： BLEAU CHARLES DALE ,  GASPER JR ,  PERLINI JULIUS JOSEPH ,  STRICKER ALFRED ALOIS

IPC: G11B23/033 ,  B31B41/00 ,  B31B50/30 ,  G11B23/03 ,  B31B1/30 ,  B31B41/26

Abstract: Apparatus for forming side flap folds in an envelope for a flexible disk wherein the envelope is formed from a flexible plastic prepunched blank having two connected sections. One section of the blank has side flaps extending from the opposite side edges. The blank is folded about an end of a mandrel (34) so that the side flaps (17) extend beyond the side edges of the mandrel. The mandrel (34) holds the plastic blank section having the flaps extending therefrom against the bottom surface of a plate (23). The mandrel has raised edge portions running along the side edges on the outward facing surface thereof. The side flaps (17) are folded around the adjacent edge of the mandrel (34) in an outward folding direction by folding blades (44) which are driven about pivot means (52) to guide the folding blades (44) in an arcuate path. Stops (64) are provided which stop the arcuate motion of the folding blades (44) and allow the upward motion means (54,68) associated with the pivot means (52) in response to the drive means (60) to cause compression of said flaps (17) against the adjacent blank section (16) and mandrel (34) by said folding blades (44) beyond said raised edge portions providing overfold zones adjacent thereto. Infra-red heating means are operable through guide openings (74) in the folding blades (44) adjacent the side folds to provide annealing of the fold thereby relieving any stresses therein.