FOLDING COVER JACKET

Japanese Patent JPS57142397

A

1. A process for the erection of a folded sleeve (1) open on one side to permit the insertion of a solid, rectangular object such as a book or a cassette, with two side panels (8, 9), two end panels (24, 25) and a spine (3) ; the outer wall of each of the two side panels is hinged to the spine by means of a folding line and the inner wall of each side panel is hinged to the relevant outer wall by means of a further folding line ; both edges of the inner and outer walls of the two side panels have flaps for the formation of the end panels and one of the inner walls has a further spine section hinged to it ; the process begins with a flat board blank, from which first of all the inner walls of the side panels are folded over on to their respective outer walls and the further spine section is folded over on to the spine, wherein the board blank (2) with the outer walls facing downwards is fed into an erecting device in which the blank is held along a folding line located between the spine (3) and the outer wall (7) of one side panel (9) and between the further spine section (17) and the inner wall (14) of this side panel ; this side panel is then bent downwards, preferably by about 30 degrees, which means that a gap is formed between the spine (3) and the further spine section (17) at the open end of the same, into which a tool is inserted in order to keep the gap open ; the side panel is then folded back and up through 90 degrees, with the result that the end panel flaps (24, 24'; 25, 25') hinged to the walls of the side panels are also folded upwards, whilst the dust flaps (52, 53) hinged to the outside end panel flaps (24, 25) that are connected to the outer wall (7) remain in their horizontal position ; these end panel flaps (24, 24'; 25, 25') are then folded - again through 90 degrees - against the other side panel (8), which has the effect that the dust flaps (52, 53) are tucked into the gap that has been kept open between the spine (3) and the further spine section (17) ; the end panel flaps (20, 21, 22, 23) hinged to the other side panel (8) are folded up through 90 degrees, after which this second side panel (8) is also folded upwards through 90 degrees ; as a result, the end panel flaps (20, 21; 22, 23) hinged to this side panel are tucked between the end panel flaps (24, 24'; 25, 25') ; following this, the folded sleeve moves on to a sealing station.

YOZEFU DETSUTOZERU
BUIRUHERUMU GORUBATSUHA
HARUMATSUTO SHIIERE

JP19994681A

September 03, 1982

December 11, 1981

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4PII NIKORAUSU KENPUTEN GMBH
AGFA GEVAERT AG

B31B3/00; B31B50/52; B42D3/18; B31B50/64; B42D3/00; B42F7/00; B42F17/08; B65D5/18; G11B23/02; G11B23/023; (IPC1-7): B42D3/18; B65D5/18

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