Abstract: A rectangular-bottomed packaging bag (1) is a rectangular-bottomed packaging bag formed by folding a sheet material member and includes a rectangular shaped bottom (2) a front (3) and a rear (4) rising from two facing sides of the bottom (2), and a pair of sides (5) connecting the front (3) and the rear (4). The pair of sides (5) each include a first region (31) positioned on the front (3) side, a second region (32) positioned on the rear (4) side, a side joining portion (33) joining the first region (31) and the second region (32), and an inclined joining portion (34) inclined to the bottom (2) side from the side joining portion (33) toward one of the front (3) and the rear (4) and joining the sheet material member of the first region (31) and the second region (32) overlapping each other in a direction of thickness.

Abstract: A square-bottomed packaging bag (1) of the present invention is a square-bottomed packaging bag formed by bending a one-piece soft packaging material and includes a quadrangular bottom surface (10), a front surface (20) and a rear surface (30) standing from two opposite sides of the bottom surface, and a left side surface (40) and a right side surface (50) connecting the front surface and the rear surface, in which each of the left side surface and the right side surface includes a first region (41, 51) positioned on the front surface side, a second region (42, 52) positioned on the rear surface side, and a side-surface-joining portion (43, 53) joining the first region and the second region.

Abstract: There is provided a fastener bag capable of improving working efficiency for the filling of inner content and forming a bag cut-starting portion. The bag is formed as gusset-type packaging bag, to which a fastener for freely opening or closing the packaging bag is attached. The fastener has a male portion to which a projected thread is formed and a female portion to which a groove is formed so as to be engaged with the projected thread. Base portions of the male and female portions are attached to an inner surface of one of the flat surface portions or side surface portions so that the projected thread and the groove face each other. A cut-tape for separating the flat surface portion into the male portion side and the female portion side is provided between the base portions.

Abstract: A fastener bag includes a packaging bag formed by heat-sealing side parts of a packaging sheet in a butt seam, and a fastening device attached to the inner surface of the packaging bag. The fastening device includes a male fastening member and a female fastening member. The male fastening member is disposed on one side of the heat-sealed butt seam of the packaging bag, and the female fastening member is disposed on the other side of the heat-sealed butt seam of the packaging bag so as to be engage with the male fastening member, and a tear-facilitating means is interposed between the male and the female fastening member. The fastener bag is capable of being opened and of being reclosed, and is suitable for use on an automatic filling and packaging machine.

Abstract: A fastener bag includes a packaging bag formed by heat-sealing side parts of a packaging sheet in a butt seam, and a fastening device attached to the inner surface of the packaging bag. The fastening device includes a male fastening member and a female fastening member. The male fastening member is disposed on one side of the heat-sealed butt seam of the packaging bag, and the female fastening member is disposed on the other side of the heat-sealed butt seam of the packaging bag so as to be engage with the male fastening member, and a tear-facilitating means is interposed between the male and the female fastening member. The fastener bag is capable of being opened and of being reclosed, and is suitable for use on an automatic filling and packaging machine.

Abstract: There is provided a fastener bag capable of improving working efficiency for the filling of inner content and surely forming a bag cut-starting portion. The faster bag 1 is formed as gusset-type packaging bag, to which a fastener 10 for freely opening or closing the packaging bag is attached. The fastener 10 is composed of a male portion 11 to which a projected thread 11b is formed and a female portion 12 to which a groove 12b is formed so as to be engaged with the projected thread 11b. Base portions 11a and 12a of both the portions 11 and 12 are attached to an inner surface of one of the flat surface portions 2 or side surface portions 3 so that the projected thread 11b and the groove 12b face each other. A cut-tape 14 for separating the flat surface portion 2 into the male portion side and the female portion side is provided between the base portions 11a and 12a.

Abstract: The present invention provides a manufacturing method and apparatus of a gusset bag, capable of coping with manufacture of various types of gusset bag and permitting improvement of productivity. A pair of flat films 12a and 12b are separated and transferred by a transfer unit 14, and a side film 15 extending in a direction perpendicular to the transfer direction of the flat films or in the same direction as the flat films and forming side surfaces 2c and 2d of the bag main body 2 is inserted between the pair of flat films 12a and 12b. The end of the side film is folded to form an open surface 43 at least at an end of the side film and the flat films.

Abstract: A packaging bag comprises a bag body, the first heat sealed portion, and the second heat sealed portion and a tear-starting portion. The bag body is made of a plastic laminate film having a pair of opposite side edges. The bag body is formed by bringing the pair of opposite side edges into contact with each other and heat-sealing them over their entirety to form a tubular shaped body having a rear heat sealed portion, and collapsing the tubular shaped body into a flatten shaped body having a front face, a rear face opposing the front face, a pair of opposite side edge portions connecting the front face and the rear face to each other, a first opened portion and a second opened portion opposing the first opened portion. The rear heat sealed portion is placed on the rear face. The first heat sealed portion is formed by heat-sealing the first opened portion. The second heat sealed-portion is formed by heat-sealing the second opened portion.

Abstract: The present invention provides a manufacturing method and apparatus of a gusset bag, capable of coping with manufacture of various types of gusset bag and permitting improvement of productivity. A pair of flat films 12 and 12b are separated and transferred by a transfer unit 14, and a side film 15 extending in a direction perpendicular to the transfer direction of the flat films or in the same direction as the flat films and forming side surfaces 2c and 2d of the bag main body 2 is inserted between the pair of flat films 12a and 12b. The ends of the side film is folded to form an open surface 43 at least at an end of the side film and the flat films.

Abstract: A package material processing machine comprises a feeding device for feeding a package material along a predetermined feed course and a processing roller having an outer circumferential surface opposite to the feed course. The package material is processed by rotating the processing roller with feeding the package material along the feed course.