Adhesive bonding and miscellaneous chemical manufacture – Differential fluid etching apparatus – With microwave gas energizing means
Patent
1982-05-28
1984-05-01
Dawson, Robert A.
Adhesive bonding and miscellaneous chemical manufacture
Differential fluid etching apparatus
With microwave gas energizing means
1562751, 156289, 156290, 1563084, 156324, 1563802, 156553, 156584, B32B 3120
Patent
active
044459602
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for the manufacturing of articles from one or several film webs by means of treatment operations, such as welding the film during transportation of the film web or webs through one or several operating stations in an apparatus, said film web or webs being during at least a portion of said transportation supported by at least one movable conveyor belt.
The present invention also relates to an apparatus for the accomplishment of the method for manufacturing of articles from one or several continous film webs including one or several welding stations, through which the film web or webs are transported, said web or webs being during at least a part of said transportation supported by at least one movable conveyor belt.
In connection with the manufacturing of articles from film webs, such as medical infusion containers, urine containers, sheets for photograph albums, folders etc., the film webs are transported through an apparatus usually stepwise while winding off the continuous webs from storage rolls. Irrespective of the fact that the film webs are transported by the application of only a traction force acting directly on the film web or the film web also is supported by a conveyor belt, non-desirable traction forces arise in the film with a risk that they are broken or that an oblique tension arises. Such an oblique tension arises especially in connection with the manufacturing of articles, where certain details are mounted, such as infusion containers, urine containers where tubings, valves and similar parts are mounted. In order to eliminate this oblique tension because of the fact that pieces of tubes are mounted to one edge of the film webs, the apparatus must be provided with a separate device for the transportation of the tube pieces. However, this separate transportation device increases the costs for the apparatus and requires a special space.
The object of the present invention is to eliminate the disadvantages mentioned above connected to the prior known methods and apparatuses.
Said object is obtained by means of a method, which is characterized in that the film web or webs are during at least one welding operation welded against the conveyor belt so that the film web or webs adhere to and are connected to the belt and conveyed via formed connections and after accomplished transportation released from the conveyor belt.
Said object is also obtained by means of anapparatus, which is characterized in that the conveyor belt extends through at least one of the welding stations over a welding dolly, so that the film web or webs are welded against the conveyor belts so that the film web or webs adhere to and are connected to the belt and conveyed via connections to a releasing station, at which the articles are released from the conveyor belt.
The invention will now be described in the following in an embodiment with reference to the enclosed drawings, on which:
FIG. 1 by means of a plan view shows an example of an article manufactured by means of the method and the apparatus according to the invention,
FIG. 2 shows a section through said article along the line II--II in FIG. 1,
FIG. 3 shows schematically a side view of a part of an apparatus according to the present invention; and
FIG. 4 shows a plan view of the apparatus according to FIG. 3.
In FIGS. 1 and 2 there is shown an example of an article, in connection with which the method and the apparatus for its manufacture according to the present invention involves great advantages. The article as shown consists of a urine container 1, which is manufactured from plastic film webs of for example polyvinyl chloride. It is apparent from FIGS. 1 and 2 that the container as a whole is formed by two outer plastic film webs 2, 3, which form a closed container by being welded to each other along a welding seam 4 which extends along the outer contour of the article and separates the article into a plurality of fields. Two inner material webs 5, 6 cover a part of the surface of the container and are connected to the fil
REFERENCES:
patent: 4214509 (1980-07-01), Van Der Meulen
patent: 4289559 (1981-09-01), Murphy
Dawson Robert A.
FIAB System AB
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