METHOD OF MANUFACTURING EXTRACT BAGS

WIPO Patent Application WO/2010/007691

A1

A method of manufacturing tetrahedral-shaped extract bags (6) made from a sheet (5) adapted to manufacture the extract bags and formed as a tubular body to be filled with contents. In the method, the sheet (5) is alternately fusion bonded and fusion cut in directions crossing each other in a plan view to form first side seals and second side seals, and, while the first side seals and the second side seals are alternately formed, the insides of tubular bodies made from the sheet (5) are filled with contents. Rockable plates (91a, 91b, 91c, 91d) rockably installed inside the tubular body of the sheet (5) are rocked before each side seal is formed, and this forms each side seal with the seal portions alternately extended flat in their respective seal directions. Electromagnets (92a, 92b, 92c, 92d) or, alternatively, gas injections (nozzles (94a, 94b, 94c, 94d)) are used as drive sources for rocking the rockable plates (91a, 91b, 91c, 91d). The extract bags of a tetrahedral shape are manufactured without causing wrinkles in the seal portions.

TSUJI YOSHIYUKI (JP)
SUNADA MASAHIRO (JP)
TAKEMOTO TOMOHIRO (JP)
SHINAGAWA YOSHIYUKI (JP)

PCT/JP2008/063048

January 21, 2010

July 18, 2008

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TSUBAKIMOTO KOGYO CO LTD (JP)
TOYAMA FAB CORP (JP)
TSUJI YOSHIYUKI (JP)
SUNADA MASAHIRO (JP)
TAKEMOTO TOMOHIRO (JP)
SHINAGAWA YOSHIYUKI (JP)

B65B29/02; B65B9/10

US5548947A	1996-08-27
JPS62165202U	1987-10-20
JPH03275409A	1991-12-06
GB2256415A	1992-12-09
JPS60136902U	1985-09-11
JPH061354Y2	1994-01-12

TAJIME & TAJIME (JP)
Patent business corporation Tajime international patent firm (JP)

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