Abstract: The present invention is a bag making machine (20, 30). The bag making machine (20, 30) includes: a conveying unit (37) which conveys a multi-layer film (S) in which films (13a, 13b) are overlapped; a side edge sealing device (27) which thermally fuses the films (13a, 13b) to each other; and an ultrasonic device (26) which crushes a part of a zipper member (14) disposed between films (13a, 13b). The side edge sealing device (27) includes: a platform (44); and a heat-generating head (45). The ultrasonic device (26) includes: an anvil (41); and an ultrasonic horn head (42). The heating-generating head (45) and the ultrasonic horn head (42) reciprocate at a same cycle via a link member (51).

Abstract: The present invention is a self-standing spout-equipped packaging bag (1), including a bag body (10) that stores contents, and a spout (12) that is attached to an upper portion of the bag body (10). The bag body (10) includes a tubular barrel portion (20), and a bottom portion (22) which is attached to block an opening end of a lower part of the barrel portion (20). The spout (12) includes a tubular nozzle portion (14), and a flange portion (16) which projects from an outer surface of the nozzle portion (14). An upper end part (21) of the tubular barrel portion (20) over an entire circumference is liquid-tightly adhered to an upper surface (16e) of the flange portion (16) in a state of following a shape of the flange portion (16) in plan view to be in the same shape.

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 method for manufacturing a rectangular-bottomed packaging bag includes an unfolding step of unfolding a flat bag by separating a pair of opening/closing plates (13) inserted into the flat bag from each other in a thickness direction of the flat bag, and a gusset forming step, after the unfolding step, of forming a side gusset and a bottom gusset by thrusting folding plates (11 and 12) between the pair of opening/closing plates (13) from the outside of the bag toward the inside of the bag.

Abstract: The present invention is a bag making machine (20, 30). The bag making machine (20, 30) includes: a conveying unit (37) which conveys a multi-layer film (S) in which films (13a, 13b) are overlapped; a side edge sealing device (27) which thermally fuses the films (13a, 13b) to each other; and an ultrasonic device (26) which crushes a part of a zipper member (14) disposed between films (13a, 13b). The side edge sealing device (27) includes: a platform (44); and a heat-generating head (45). The ultrasonic device (26) includes: an anvil (41); and an ultrasonic horn head (42). The heating-generating head (45) and the ultrasonic horn head (42) reciprocate at a same cycle via a link member (51).

Abstract: A structure of a mouth plug portion includes a nozzle and a cap, the nozzle includes a first outer protrusion and a second outer protrusion, the first outer protrusion includes a locking surface that locks the cap and a first guide surface spirally extending, the cap includes a cap body and a tamper band provided with a weak portion that can be broken by an external force received from the second outer protrusion during rotation of the cap body, the cap body includes a first inner protrusion and a second inner protrusion, an outer peripheral surface of the nozzle is provided with a second guide surface along which the first inner protrusion and the second inner protrusion can move in an axial direction.

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: The present invention is a self-standing spout-equipped packaging bag (1), including a bag body (10) that stores contents, and a spout (12) that is attached to an upper portion of the bag body (10). The bag body (10) includes a tubular barrel portion (20), and a bottom portion (22) which is attached to block an opening end of a lower part of the barrel portion (20). The spout (12) includes a tubular nozzle portion (14), and a flange portion (16) which projects from an outer surface of the nozzle portion (14). An upper end part (21) of the tubular barrel portion (20) over an entire circumference is liquid-tightly adhered to an upper surface (16e) of the flange portion (16) in a state of following a shape of the flange portion (16) in plan view to be in the same shape.

Abstract: A self-standing bag (1) is provided, including: a body portion (10) formed of a body member (10A) in a tubular shape; and a bottom portion (12) formed of a half-folded bottom member (12A), in which each of side ends of the bottom member (12A) is bonded to an inner surface of a rear surface portion (20) of the body portion (10), a lower end of the bottom member (12A) is bonded to a lower end of the body portion (10) on an entire circumference of the body portion (10), on the body portion (10) side of the bottom member (12A), an adhesive film (22) for bonding a side end of the bottom member (12A) to the body portion (10) is laminated to cover the entire bottom member (12A), both side ends of the adhesive film (22) respectively protrude from both the side ends of the bottom member (12A) in a width direction, and bonding of the side end of the bottom member (12A) to the inner surface of the body portion (10) is achieved by the adhesive film (22).

Abstract: A structure of a mouth plug portion includes a nozzle and a cap, the nozzle includes a first outer protrusion and a second outer protrusion, the first outer protrusion includes a locking surface that locks the cap and a first guide surface spirally extending, the cap includes a cap body and a tamper band provided with a weak portion that can be broken by an external force received from the second outer protrusion during rotation of the cap body, the cap body includes a first inner protrusion and a second inner protrusion, an outer peripheral surface of the nozzle is provided with a second guide surface along which the first inner protrusion and the second inner protrusion can move in an axial direction.

Abstract: A self-standing bag (1) is provided, including: a body portion (10) formed of a body member (10A) in a tubular shape; and a bottom portion (12) formed of a half-folded bottom member (12A), in which each of side ends of the bottom member (12A) is bonded to an inner surface of a rear surface portion (20) of the body portion (10), a lower end of the bottom member (12A) is bonded to a lower end of the body portion (10) on an entire circumference of the body portion (10), on the body portion (10) side of the bottom member (12A), an adhesive film (22) for bonding a side end of the bottom member (12A) to the body portion (10) is laminated to cover the entire bottom member (12A), both side ends of the adhesive film (22) respectively protrude from both the side ends of the bottom member (12A) in a width direction, and bonding of the side end of the bottom member (12A) to the inner surface of the body portion (10) is achieved by the adhesive film (22).

Abstract: A gusset bag has a spout that keeps a stable self-standing attitude, facilitating easy and complete content pouring. The gusset bag includes a film bag body and a spout attached to the bag body. The bag body includes a tubular body and a rectangular-shaped bottom surface sealed and secured to one edge of the tubular body. The tubular body includes opposing flat surfaces and side surfaces, each being sealed and secured to side edges of the flat surfaces, the bottom surface and the side surfaces being formed with foldable lines, respectively, along which the bottom surface and the side surfaces are folded inward toward inside of the bag body, forming a bottom surface gusset and side surface gussets, and an inclining edge is formed to one of the upper two corners of the bag body, the spout being attached to the inclining edge.

Abstract: A check valve of one embodiment includes a spout member which has a flow path inside, an urging member supported by an inner end portion of the spout member, a valve body connected to the urging member, and a cylindrical member having a flow path inside, and is provided with a valve seat portion on an inner circumferential face, the spout member is fixedly attached to the cylindrical member so that the valve body and the urging member are inserted into the cylindrical member and the valve body is urged to the valve seat portion by the urging member, and the flow path and the flow path communicate with each other to configure an outflow path through which the content in the vessel flows out.

Abstract: A gusset bag (10), having a pair of flat surface portions (11, 11) facing each other and a pair of side surface portions (12, 12) facing each other which are folded toward the inside, has a side edge sealing portion (13) in which the flat surface portion and the side surface portion are heat-sealed together at side edge portions thereof, and a folded-back portion (13c) in which all or a part of the side edge sealing portion in the width direction is folded back toward the flat surface portion or the side surface portion. The gusset bag and a spout-attached gusset bag (1) using the gusset bag have an excellent self-standing property, and causes one's hand to feel little pain even when being squeezed.

Abstract: A gusset bag includes: a pair of flat surface portions facing each other; and a pair of side surface portions facing each other and folded inward of the gusset bag. A containing portion used to contain an object is formed using the flat surface portions and the side surface portions. The gusset bag has a side edge-sealing portion in which a side edge portion of a flat surface portion of the flat surface portions and a side edge portion of a side surface portion of the side surface portions are heat-sealed together, and a folded-back portion in which the entire side edge-sealing portion is folded back and affixed to the flat surface portion or the side surface portion that forms the containing portion. The peel strength of the folded-back portion is lower than the peel strength of the side edge-sealing portion.

Abstract: A gusset bag is formed of a pair of flat surface parts facing each other, and side gusset parts folded to the inside of the bag. The gusset bag has side heat-sealing portions at which the sides of the flat surface part and sides of the side gusset parts are joined at the inner surfaces thereof, side heat-sealing portions at which the sides of the flat surface part and the other sides of the side gusset parts are joined at the inner surfaces thereof, and closing sealing portions at which the side heat-sealing portions and the side heat-sealing portions are joined at the outer surfaces of the side gusset parts by ultrasonic sealing. With this configuration, in the gusset bag, it is possible to easily close the gusset parts, while preventing film pieces or dust from entering the bag in a step of closing the gusset parts.

Abstract: A gusset bag has a spout that keeps a stable self-standing attitude, facilitating easy and complete content pouring. The gusset bag includes a film bag body and a spout attached to the bag body. The bag body includes a tubular body and a rectangular-shaped bottom surface sealed and secured to one edge of the tubular body. The tubular body includes opposing flat surfaces and side surfaces, each being sealed and secured to side edges of the flat surfaces, the bottom surface and the side surfaces being formed with foldable lines, respectively, along which the bottom surface and the side surfaces are folded inward toward inside of the bag body, forming a bottom surface gusset and side surface gussets, and an inclining edge is formed to one of the upper two corners of the bag body, the spout being attached to the inclining edge.