Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1997-12-05
1999-08-17
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156147, 53403, A63B 3900
Patent
active
059388773
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
From an environmental viewpoint and cost considerations associated therewith, there are a growing number of objections to the use of chips of plastic material and shredded paper as filling material in packagings.
Known from the international applications WO94/07678 and WO91/12175 are methods and devices for filling with air small cushions which, individually or as a mutually adhered series, can be used as filling material. After use the volume of these cushions can be reduced and the plastic material removed, for instance to be re-used.
A problem of this known device and method relates to the arranging of holes in sufficiently reliable manner in a tubular foil from which the cushions are made. It has been found in practice that many formed air cushions do not have a sufficient air filling, for example because during piercing of a hole two holes are pierced in the tube form, wherein the air will escape through the second hole. Furthermore, with the known device and method equipment is required for injecting air under pressure.
SUMMARY OF THE INVENTION
The present invention provides a method for manufacturing one or more cushions filled with air from a piece of material having a tube form, wherein a piston member is placed into the material, a hole is pierced in the material, the piston member and the material are moved and one or more weld seams are arranged in the material.
The present invention further provides a device for manufacturing one or more cushions filled with air from a piece of material having a tube form, comprising: to move together with the tube form; and
Further advantages, features and details of the present invention will become apparent in the light of the following description and associated drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a partially broken away view in perspective of a first preferred embodiment of the present invention;
FIG. 2 shows an enlarged view of detail II of FIG. 1; and
FIGS. 3A-3E show schematic views of respective operative positions of the device shown in FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A preferred embodiment of a device 1 according to the present invention comprises a frame 2 to which is fixed an annular plate 3. Further fixed to frame 2 is a lifting device 4 which serves to lift and lower a fork-like member 5. A piercing member 6, welding members 7 and 8 respectively, clamping means 20 and holding means 9, 25 are further arranged on frame 2.
In the method according to the present invention a piston member 10 comprising a stationary part 11 (FIG. 2) and a movable plunger part 12 is first of all inserted into a piece of tubular material M. The stationary part 11 is provided with a shoulder 13 which rests on the edge of the central opening in the annular plate 3. The stationary part 11 is also provided with a central bore in which can slide a hollow sliding rod 14 which is fixedly connected to the movable plunger part 12. The movable plunger part 12 is further provided with a radial groove 15 in which debouches a channel 16 which is arranged internally in the plunger part 12 and connects onto the internal channel of the hollow sliding rod 14.
From the starting position shown in FIG. 3A the piercing member 6 is moved into the position shown in FIG. 3B, preferably in a tangential direction along the groove 15, so that the outer end of the piercing member does not come into contact with plunger part 12. Piercing member 6 is then retracted and plunger 12 is moved upward using the fork member 5 to the position shown in FIGS. 3C and 3D. In this upward movement the tubular material M, for example of polyethylene or polyester, is also transported upward. Through the upward movement of plunger part 12 between the positions shown in FIGS. 3B and 3C, air is drawn in through the hole 19 pierced in the tube form. Clamps 21 and 22, which are movable in a manner not shown between the positions shown in FIGS. 3A, 3B, 3C and 3E on the one hand and the position shown in FIG. 3D on the other, clamp the tube form in
REFERENCES:
patent: 4169344 (1979-10-01), Ganz et al.
patent: 4564407 (1986-01-01), Tsuruta
Ball Michael W.
Mitchell Shawn A.
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