US 3347136 A
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Oct. 17, 1967 G. KURE 3,347,136
PROCESS AND ARRANGEMENT FOR PRODUCTION AND PLACING OF FILLING MATERIAL IN HOLLOW BUILDING ELEMENTS Filed. Feb. 13, 1964 2 Sheets-Sheet l INVENTORF 9 12002 lfww, $74 fioum'rrv Oct. 17, 1967 G. KURE 3,347,136
PROCESS AND ARRANGEMENT FOR PRODUCTION AND PLACING OF FILLING MATERIAL IN HOLLOW BUILDING ELEMENTS Filed Feb-13, 1964 2 Sheets-Sheet 2 INVEN TOR United States Patent Ofifice Patented Oct. 17, 1967 4 Claims. ic1.93 1
ABSTRACT OF THE DISCLOSURE A method and machine for slitting a web paper or similar material, turning the strips 90, shaping them and feeding them over the open face of a door or other building element, cutting off predetermined lengths and allowing them to drop freely into said open face, prior to completing the door or element.
The invention relates to a process and arrangements by aid of which one can simultaneously produce and place filling material in hollow building elements, the material consisting of strips of paper, cardboard or the like which are given a suitable shape, for example waved or zigzag and positioned edgewise between the flat side panels of the building elements.
For a series of elements in house-building, like doors, kitchen sections, wardrobes, partition walls, etc., a construction is used to a great extent consisting of a frame of wood to which is stuck a stiff plate, usually of plywood or wood fibre, on both sides. To give these elements a greater stability and strength, it is most often desirable to fill the hollow space with a suitable material. Known materials include compressed straw, approximately round planer chips and various forms of paper or cardboard. The last-mentioned materials have lately become dominant, and the most suitable construction has proved to be the so called honeycomb type. This consists of upright paper strips lying next to one another, which are bent or folded in a certain pattern, so that the strips touch one another at several points at-which they are glued together.
Both this and other known production methods for paper-, cardboardor corrugated cardboard fillings have however the great disadvantage that they must be made in expensive and complicated machines. This makes the products much more expensive. The honeycomb fillings for example, that are usually made only by a special factory in each country, are delivered to the wood-ware factories at a price which is many times as high as the price of the paper roll from which the product is made.
The object of the present invention is to enable most wood-ware factories, themselves, to produce fillings from the paper rolls by aid of a relatively simple machine, which inserts the fillings into the frameworks or the like that are to be filled.
The invention concerns more specifically a process for production and placing of lightweight, reinforcing filling material in hollow building elements as for example doors or the like, which material is comprised of upright strips of paper, cardboard or the like of a suitable length. The strips while standing edgewise are passed through suitable mechanical means and bent or folded into suitable waveor zig-zag-shape, the new and characteristic features being, that the shaped and cut strip material, without being stuck together, is guided into the framework of the building element. The framework is placed near the strip-making device to receive the strips from said device.
In the drawings FIG. 1 is a side elevation view of a machine embodying the invention.
FIG. 2 is a plan view of the machine.
FIG. 3 shows schematically the passage of a strip through the machine.
Strips of filling material according to the invention are in the present example made from a big paper roll 1. This roll is journaled with its shaft horizontal, which at the ends is supported on a suitable rack 6. The driving motor 7 rotates the roller over the driving wheel 8 in the direction of the arrow.
The web 10 which is advanced from the roll 1 is guided in the example shown first between driving rollers which are synchronized with the driving wheel 8. Then the web 10 goes to some pairs of circular knives 2, which divide the web 10 into a number of parallel strips 10. These then pass through a turning arrangement 3, where they by suitable guiding means are turned about their longitudinal axis, so that their side surfaces turn towards one another. In such upright, parallel position 10", the strips go through driving rollers 9 to a shaping arrangement 4. In this the strips are submitted to the elIect of suitable bending or folding means, for example co-operating rollers with a non-circular circumference, between which the upright strips are guided. The non-circular circumference, which consists of an elastic material, can be shaped so that the desired wave-shape is obtained, and also the desired shape if the waves are 'cut up separately so that they either form an open U-shape, or are shaped as ringor spiral-like elements on account of the prestressing they have had during the rolling.
This arrangement can also have good shapingqualities when the small rollers, that are made of a material with a low friction coefficient, do not rotate.
The shaping arrangement can also consist of suitable can be arranged in the folding or bending points of the strips, or other deformation, which gives the strips further stiffness.
From the shaping arrangement 4 the strips go out, hereby passing cutting means 5 that optionally can be brought into effect.
In FIG. 3 is shown schematically how such a paper strip 10' by passing between two pairs of rollers 15 and 16 is given a waved shape. The big rollers 17 and 18 have eccentric elastic coating 19 and 20, into which the small rollers 21 and 22 can penetrate somewhat and cause the desired deformation of the paper strip 10'. A knife arrangement 23, cuts the strip into suitable lengths, either for continual course right across the framework to be filled, or in suitable lengths, as indicated at the bottom of FIG. 3.
The waveor zig-zag-shaped strips 10" can go out from the machine and down into the door-cavity or the like in phase or out of phase, according to what is found suitable.
The building element 11 which is to be filled is placed on a table 13 just below the advanced strips 10'. When these are fed out with a distance corresponding to f.i., the breadth of the element that is to be filled, the knives 5 are brought into action, and the whole lot of folded strips 10" falls down into the cavity of the building element. This is in advance provided with glue on the upwards turning side of the lower plate, whereby the strips are immediately glued to this.
The placing of strips 10" of filling material in the hollow building element can however take place in several ways. Thus the outer end of the non-supported strips can for example be allowed to drop by their own weight till they touch the right edge of the cavity of the building element in the drawing, whereupon the building element and the strips 10' are moved forwards simultaneously, until cutting takes place by aid of the knives 5, and the ends of the strips also fall down and are glued to the building element.
Alternatively, the advanced, shaped strips 10" can be supported on suitable rails, guiding means, supporting rods or other transport means which are schematically indicated by dotted lines 12. These means can then by suitable arrangements, that are not shown, be brought to convey the strips down on the building element.
The table 13 or the like on which the building element 11 is supported can with advantage be provided with transport means 14 for moving the element 11 in the same direction and with the same or approximately the same speed as the advancing of the strips 10".
As it will be understood from the above, there is provided according to the invention a process and an arrangement for the production and placing of filling material in hollow building elements, this filling material being of the shape described above. Thereby the production of filling material can take place directly from for example a paper roll at the place where it is to be used and be put down directly in a hollow building element, for example in a door-filling, a wall section or the like. Thereby the price of the filling material is reduced to a fraction of the costs that are incurred with the filling material of this type that is generally used. Further the direct placing of the material is done more quickly and with less work, which also means a great saving and technical progress.
It will be understood that what is shown and described above are only examples of how the invention can be used, and that the invention is not limited to these examples; thus it may in certain cases be advantageous to arrange the treatment steps of dividing, turning, shaping and cutting in another order than described above.
1. In a process of filling hollow building elements as for example doors or the like with lightweight, stifi paper filling material, the steps comprising continuously leading a web of said material from a roll toward the building element, slitting the material lengthwise into strips, twisting the strips longitudinally 90 so that surfaces of adjacent portions of the strips are parallel to each other, forming undulations in the strips, cutting the individual bent strips into discontinuous bent pieces and letting said pieces fall edgewise freely into the building element.
2. Apparatus for filling a 'hollow building element as for example doors or the like with lightweight stiif paper filling material, comprising a combination of a support for said building element, means for continuously leading a web of said material toward the building element over said support, means for slitting the material lengthwise into parallel strips, means for turning the strips individually ninety degrees longitudinally so that surfaces of adjacent portions of the strips are parallel to each other, means for forming lateral bends in the edgewise oriented strips, means for cutting the individual bent strips into discontinuous bent pieces whereby said pieces may fall edgewise freely into an open face of the building element on said support.
3. Apparatus for filling a hollow building element as for example doors orlthe like with lightweight, stiff paper filling material, comprising a combination of supporting means for said building element a storage roll for a web of said material, means for moving said Web toward the building element and over said supporting means, means for slitting the web longitudinally into a plurality of strips, separate means for twisting each strip longitudinally and shaping each strip, means for cutting the individual shaped strips into shaped pieces, and letting said pieces fall edgewise freely into the building element, and transport means for moving the building element in the same direction and with approximately the same speed as the strips of filling material..
4. Apparatus as claimed in claim 2 wherein the means forming the lateral bends comprise pairs of cooperating rollers, at least one roller of each pair having a noncircular periphery.
References Cited UNITED STATES PATENTS 2,475,789 7/1949 Kunz. 2,606,133 8/ 1952 Havens. 2,633,439 3/1953 Konstandt 52615 X 2,697,461 12/ 1954 Konstandt 526 15 X FOREIGN PATENTS 529,027 6/1954 Belgium. 145,854 6/1920 Great Britain. 843,631 8/ 1960 Great Britain.
BERNARD STICKNEY, Primary Examiner. FRANKgE. BAILEY, Examiner.