摘要:
Sacks are successively filled and closed in an automatic process by suspending each sack from near the mouth and spreading the side walls apart, filling the sack, allowing it to settle on a support while keeping the side walls taut, bringing the side walls together near the mouth and folding them over onto themselves, welding a closure tape over the folded-over portion and the adjoining unfolded portion of the sack, crimping the unfilled upper part of the sack and gathering it to form a frill, and applying a clamping ring beneath the frill.
摘要:
In an apparatus for separating flattened valved sacks which are reeled in an overlapping formation, the reel is turned by endless belts pressing on the reel periphery as the overlapping sacks are being taken off the reel. A roller presses the overlapping sack formation onto the belts and this roller is disposed at a spacing of no more than about one sack length from the point where the sacks leave the reel.
摘要:
Bags are fabricated from tubular plastics film as they are being filled. A flattened severed tube section of the bag material is clamped across its entire width at the bottom but only near the folded longitudinal edges (or the side pleats if such are provided) at the top. The walls of the tube section are pulled apart at the top between the clamped regions to present a filling aperture and welded together at the bottom across the entire width below the clamped region. After the contents of the bag have been inserted through the filling aperture, the top of the tube section is welded shut above the clamped regions and the bag is discharged.
摘要:
Lifting gear for a filled sack comprises a pair of clamping bars between which the gathered and flattened mouth portion of the sack can be clamped after the mouth portion has been slung thereabout. The bars are in the form of parallel cantilever arms and rotatable about an axis parallel thereto, one of the bars also being displaceable to and from the other bar while remaining parallel thereto.
摘要:
The invention relates to a device for filling and sealing sacks, which are open on one side and are provided preferably with side folds. Said device comprises a filling station, which exhibits a filling pipe and serves the purpose of filling sacks; comprises various grippers for transporting away the empty sacks; holding the sacks in the filling station and transporting away the filled sacks, and comprises a conveyor belt, which starts below the filling station and serves the purpose of bracing and carrying away the filled sacks. Said conveyor belt exhibits at least one stand that revolves around two deflecting rollers. According to the invention, the conveyor belt in the region below the filling station can be lowered and raised again by swivelling the deflecting roller. Below the carrying run of the conveyor belt there is an additional vibrator in the region of the filling station.
摘要:
A filling device for bulk materials includes a filling hopper, a housing surrounding an open end of the filling hopper and two hopper outlet doors which are pivoted in the the housing. In order to achieve the object of further developing the filling hopper so as to enable loss-free operation to take place, the filling hopper or, respectively, a casing surrounding the same has an external encircling section. Furthermore rubber sealing strips are provided on the hopper outlet doors, which come into sealing engagement with the encircling section when the hopper outlet doors are moved by a control system into the open position thereof.
摘要:
In an apparatus for successively enveloping stacks of flat workpieces in bags, an inverted said bag is placed over a shaft in which a stack is located. A reciprocatable slide in the shaft comprising upwardly open U-section supporting bars for the stack presses the stack upwardly into the bag against a backing member disposed above the shaft, whereafter rod members enter the shaft in a lateral direction, are received in the U-sections of the supporting bars and are pivotable together with the back member to swing the enveloped stack away from the supporting bars and out of the shaft.
摘要:
The invention relates to a process for manufacturing a bag (25, 40) from a polymer and/or metal film material. The lower end of the sack (25, 40) is sealed and has four outer walls (A-D) that are connected by four seams (27). The novelty and inventive step of said process is that the material (A-E) required for forming the bag is fed in the form of a film tube (25, 40) that is wound up on a roll to an unwinding station of a bottom forming device that separates the unwound film tube into film tube segments and seals at least one end of the bag.
摘要:
The invention relates to a method for making, filling and sealing sacks from a tubular film web of thermoplastic material preferably provided with side folds and printed in format print, where the leading end of the tubular film web is each provided with a transverse weld, and from the tubular film web a section constituting an open sack is cut off, and where the sack is then filled and the open end of the sack is sealed by a transverse weld. For the solution of the object to provide a method of this kind, where it is ensured that the filled sacks are always filled tight and full, it is provided that corresponding to the filling level of the sack the length of the formed tubular film web sections is varied, that after making the transverse weld sealing the sack the tubular film web is intermittently advanced up to a printed mark, that the section constituting the sack is cut off by means of a separating cut without at the same time forming the transverse weld sealing the tube section, that the succeeding tubular film web is again advanced by a comparatively short adjustable length, that alternatively the advanced section of the tubular film web is cut off again, and that the transverse weld sealing the succeeding tube section is formed.
摘要:
This invention relates to apparatus for infolding laterally protruding wings of a filled sack onto adhesive strips provided on the top of the sack. Said wings have been formed when the top end portion of the sack has been stretched flat and has been closed by a seam weld and has been folded down onto one half of the flattened top surface of the sack. Two folding bars or folding rods are movably mounted in a machine frame and protrude freely in the direction in which the sacks are conveyed. Said folding bars or rods are adapted to be lowered onto and raised from the top surface of each sack and have outer edges defining fold lines for the wings to be infolded. Holders are mounted in the machine frame on both sides of the sack standing upright on a support. Each of said holders carries a holder frame provided with a gripper arm for engaging one of the wings from below. An upper gripper arm for cooperating with the lower gripper arm is pivoted in each of said holder frames. The holders are movable between an outer portion, in which the ends of the gripper arms are disposed laterally of and above the sack, and an inner position, in which the lower gripper arms force the infolded wings onto the adhesive strips.