초록 ▼

A device for opening bags (12) held in fixtures (32) movable in an operation direction is disclosed including first and second suction cups (104, 106). The first suction cups (104) are mounted to an elongated bar (108) slideably mounted on posts (112) in turn upstanding from pivot arms (110). The el

A device for opening bags (12) held in fixtures (32) movable in an operation direction is disclosed including first and second suction cups (104, 106). The first suction cups (104) are mounted to an elongated bar (108) slideably mounted on posts (112) in turn upstanding from pivot arms (110). The elongated bar (108) can be slid on the posts (112) to an upper, transport position allowing passage of the fixtures (32) and bags (12) held therein. The second suction cups (106) are mounted to the lower ends of rods (114) mounted to a slide shaft (116), with sliding of the slide shaft (116) moving the rods (114) and suction cups (106) from a transport position intermediate the lanes of the fixtures (32) as they move in the operation direction and an attachment position in front of the bags (12). The slide shaft (116) and the rods (114) are tilted along an arc to open the unsealed ends (22) of the bags (12). During opening, the bottoms (16) of the bags (12) deform around first and second, stationary pins (280) which then sandwich the top gussets of the sides (18) of the bags (12) against the tops (14) of the bags (12). After release of the suction cups (104, 106), the tops (14) of the bags (12) deform around the stationary pins (280) when the fixtures (32) move in the operation direction.

대표청구항 ▼

Device for opening a bag having a top panel, a bottom panel, an unsealed end, and first and second gusseted sides, with each gusseted side including at least a top gusset and a bottom gusset, with the top gusset being pivotally connected to the top panel about a fold line and the bottom gusset being

Device for opening a bag having a top panel, a bottom panel, an unsealed end, and first and second gusseted sides, with each gusseted side including at least a top gusset and a bottom gusset, with the top gusset being pivotally connected to the top panel about a fold line and the bottom gusset being pivotally connected to the bottom panel about a fold line, with the bag being movable in a lane in an operation direction generally perpendicular to the top panel and the bottom panel, comprising, in combination: first means for removable securement to the top panel; second means for removable securement to the bottom panel; means for moving the first means between a transport position and an attachment position; means for moving the second means from a transport position to an attachment position and then to an open position and back to the transport position, with the bag being movable in the operation direction past the first and second means in their transport positions and with the unsealed end of the bag being opened while the first means is in its attachment position and when the second means is moved from its attachment position to its open position; and means for biasing the separation of the bottom panel from the bottom gussets greater than the top panel from the top gussets comprising, in combination: first and second parallel pins positioned generally parallel to and spaced from each other a distance less than the distance between the fold lines of the top gussets and the top panel, means for moving said bags in said operation direction to a position in which the bag with both the bottom and top panels are on one side of the parallel pins and with the pins engaging the bottom panel of the bag below the unsealed end when the bag moves in the lane, said first and second pins engaging the top gussets and sandwiching them against the top panel while the first means is in its attachment position; wherein the bottom panel deforms around and is positioned on the Opposite side of the pins as the second means moves from the attachment position to the open position.