Sheet-material associating – Associating and folding – Sheet associating
Patent
1989-04-26
1991-09-17
Look, Edward K.
Sheet-material associating
Associating and folding
Sheet associating
270 37, 493420, 118 32, 118681, 156364, B42C 100
Patent
active
050488090
ABSTRACT:
An apparatus and method for sheet folding and sealing to produce mailable letter-like objects, each from a single preprinted sheet, comprises a feed mechanism for the feed of sheets in seriatim while continuous beads of adhesive are applied to each sheet along lateral portions thereof. The sheets are fed into a buckle folder which makes one or more transverse folds in each sheet while transversely-spaced spots of adhesive are applied along a transverse line across the sheet. The buckle folder is structured so that it has fold pans on one side; and, both the input and output are on the other side. The folder also includes folding and sealing rolls that seal folded-over sheet portions to close and seal the sheet into a letter-like object. A perforator perforates the object so that tearing along the perforations facilitates opening.
REFERENCES:
patent: 3336726 (1967-08-01), Mayer
patent: 3511013 (1970-05-01), Pahlitsch
patent: 4104983 (1978-08-01), Carstedt
patent: 4817931 (1989-04-01), Vijuk
patent: 4865578 (1989-12-01), Moll
patent: 4900391 (1990-02-01), Mandel
patent: 4957284 (1990-09-01), Brabant
patent: 4966353 (1990-10-01), Lehmann
Didier Carl J.
Tebbe Patrick A.
Baumfolder Corporation
Look Edward K.
Newholm Therese M.
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