APPARATUS FOR UNROLLING WEB SHAPED MATERIAL UPON A SUBSTRATUM

Abstract: An apparatus serves for unrolling web shaped material upon a substratum (28). The apparatus comprises a frame structure (1) having bearing means (22) for mounting a roll (48) of the material. The frame structure (1), moreover, supports guiding means (12, 13, 14) for the web and the mounting means (22) together with the guiding means (12, 13, 14) are arranged in such a way that a part of the web being unrolled is accessible for heating by means of a burner arrangement (40). In order to obtain a secure controlling of the roll (48) during the unrolling of the web shaped material, the guiding means (12, 13, 14) for the web are arranged upon the frame structure (1) in such a way that a web being unrolled is moved from the roll (48) in question in the upward direction and around the guiding means (12, 13, 14) and downward around the roll (48) being unrolled between the latter and the substratum (28).

Description: APPARATUS FOR ONROLLING WEB SHAPED MATERIAL UPON A SUBSTRATUM. The present invention relates to an apparatus for onrolling web shaped material upon a substratum and of the kind comprising a frame structure having moving means, means for rotatably mounting a roll of the material and guiding means for the web, the mounting means and the guiding means being so adapted that a part of the web unrolled from the roll of material being onrolled, is accessible for heating by means of a burner arrangement. An apparatus of this kind is known from Derwent's Abstract No. C8008 D/13; SU-747-965. According to this prior art the mounting means for the web consist of two upward open bearing cavities arranged at the upper ends of two side rods of the frame structure. The guiding means for the web are constituted by a pressure roller rotatably supported in the frame structure below the roll and during the onrolling the web shaped material extends from the roll and inwardly below the pressure roller, viz. between the pressure roller and the substratum upon which the web shaped material is to be arranged. The burner arrangement of this known apparatus is arranged in such a way that the burner or burners are directed towards the gab between the pressure roller and, accordingly, towards the web shaped material guided around the pressure roller and towards the substratum. However, nothing prevents the burner from being directed towards the part of the web unrolled from the roll of material and at a distance from the substratum and also at a distance from the roll of material itself. When the apparatus in question is drawn with respect to the substratum by applying a pulling force to the moving means, the pressure roller presses the web firmly against the substratum after the web has been heated by means of the burner arrangement and the web is unrolled from the loosely mounted roll. If this known apparatus is moved at a high speed or is stopped abruptly, the roll will due to its inertia continue its movement of rotation and thereby a greater part of the roll will be unrolled than corre¬ sponding to the distance between the roll and the pressure roller, whereby the part of the web being heated may form buckles, and accordingly, may be slackened from the pressure roller and get too close to the burner arrangement. According to the present invention the apparatus is characterized in that the mounting means for the roll and the guiding means for the web are arranged on the frame structure in such a way that a web, when being unrolled, is moved in the upward direction from the roll being unrolled, around the guiding means and in the downward direc¬ tion around the roll being unrolled, between the roll and the substratum. By means of such construction it is achieved that the web being onrolled, due to the fact that it is wrapped around the roll being unrolled, will control the speed of rotation of the roll in such a way that uncontrolled rotation of the roll is avoided because the roll will be rotated with generally the same peripheral speed as the speed with which the web is being rolled onto the substratum. The invention will hereinafter be further explained with reference to the drawing on which fig. 1 shows a side view of an embodiment of the apparatus according to the invention, fig. 2 shows the apparatus shown in fig. 1 as seen from the left- hand side, fig. 3 shows a part of a side frame for the apparatus shown with the lower surface facing upward and a roll of web shaped material, fig. 4 shows on an enlarged scale a section of moving means for the apparatus shown in fig. 1, fig. 5 shows a locking pin, and fig. 6 shows a locking tongue. On the drawing 1 is a frame structure for the apparatus shown. The frame structure consists of two side frame pieces 2,3, fig. 2, each of which has two parts 4,5 and 6,7 respectively. The two parts 4,5 and 6,7 respectively of each side frame piece form, as it appears from fig. 1, wherein a side view of the apparatus is shown, an obtuse angle with each other, which according to the embodiment shown is approximately 120°. One of the ends 9,10 respectively of the two side frame pieces are mutually connected by means of a connecting rod 11 which supports web guiding means in the form of three idle rollers 12,13,14. The other ends 16,17 respectively of the side frame pieces 2 and 3 respectively are mutually connected by means of an end frame piece 18 upon which two wheels 19,20 are rotatably supported as shown on fig. 2. Each of the two side frame pieces 2 and 3 is provided with bearing means. The bearing means appear clearly from fig. 3 which shows a part of the side frame piece 3 turned upside down. The bearing means comprise a bearing cavity 22 which on fig. 3 faces upward but which in the position of use of the apparatus faces downward. A bearing cover 23 belongs to this bearing cavity and the cover 23 is according to the embodiment shown pivotally connected with the side frame piece 3 in question by means of a screw 24. The bearing cavity 22, and this also applies as regards the corresponding bearing cavity in the other side piece 2, is provided in the side piece part 5 and 7 respectively and adjacent the apex of the angle which the two parts 4,5 and 6,7 respectively of each side frame piece form with each other. To the end frame piece 18 moving means 27 are secured by means of which the frame structure 1 may be moved upon a substratum 28 in the direction of the arrow 29, fig. 1. The moving means consist of a tubular part 30 secured to the end frame piece 18 and a rod formed part 31 provided with a handle 32', and of which a part is accomo- dated in the tubular part 30. A row of holes 32 is provided in the rod formed part 31 and a corresponding hole 33 extends through the upper end of the tubular part 30, see fig. 4. A pin 35, fig. 5, belongs to the moving means and fits into the holes 32,33 and in such a way that the rod formed part 31 may be locked with respect to the tubular part 30 in different positions for adapting the total length of the rod consisting of the tubular part 30 and the rod formed part 31. The pin 35 is being locked in its inserted position by means of a locking tongue 36 which is pivotally connected with a securing ring 37 by means of which an easy withdrawal of the locking tongue 36 from the corresponding hole 38 in the locking pin 35 is achieved. The apparatus also comprises a burner arrangement 40 shown in dotted lines, and which is provided with two burners 41,42 as it appears from fig. 2. The burner arrangement is intended for connection with a source of gas, viz. by means of a stub 42 provided with a control valve 43 for controlling the flow of gas. The burner arrangement may be supported by the frame structure 1 or the moving means 27 in a way known per se and, accordingly, not further illustrated. However, in this respect reference is made to the international publication no. WO 82/04278 belonging to the same applicant. As it appears from fig. 1, the moving means 27 together with the frame parts 4,6 of the side frame pieces 2 and 3 form an upward diverging angle i.e. an angle which diverges in direction away from the frame parts 5,7 and this angle is approximately 60°. Such construction offers many possibilities for directing the burners 41,42 in such a way that only the web shaped material is heated whereas a heating of the substratum is avoided. In order to control the roll 48 safely with respect to the shaft 46 reinforcing rollers 49 and 50 may be arranged on the shaft 46 as shown on fig. 2. The apparatus shown is used in the following way: A shaft 46, cf. fig. 3, is being inserted through the opening of a roll of web material 48 to be onrolled. The frame structure 1 is now arranged with the downward open bearing cavities 22 positioned over a corresponding one of the projecting ends of the shaft 46 with the bearing covers 23 pivoted to the position shown on fig. 3. Now the bearing covers 23 are pivoted in the direction of the arrow 23' on fig. 3 in such a way that the ends of the shaft are locked in the bearing cavities 22. The pivoting of each bearing cover 23 is limited by means of a stop lug 23" secured by welding. Now the free end of the web shaped material rolled into roll shape is withdrawn from the roll and moved upward around the guiding means 12,13 and 14 and again downward where the end of the web is wrapped around the roll 48. Thereby a part 52 unrolled from the roll of material is formed extending from the rollers 12,13,14 to the roll of material 48, which is accessible for heating. The apparatus is now prepared for onrolling the web in question, viz. by movement in direction opposite the arrow 29, fig. 1, by pulling the moving means 27. Before the onrolling is initiated, the web is heated by means of the burners 41,42. By tilting the moving means 27 more or less the frame of the frame structure may be tilted in such a way that the roll 48 is pressed more or less against the substratum 28. During the onrolling itself, the speed with which the web material is rolled upon the substratum 28 will control the speed of rotation of the roll 48 about the shaft 46 because the peripheral speed of the roll will correspond to the onrolling speed of the web with respect to the substratum 28 which is due to the fact that the part of the web being onrolled is wrapped around the roll. Due to the fact that radius for that part of the web, which passes the roll, is a little longer, namely the thickness of the web longer, than the diameter of the outermost coil of the roll, a tightening of the part of the web extending from the roll of material and up to the guiding means 12,13,14, and around the latter and down to the roll of material, may occur but such tightening will only add to maintain the web part 52 in a tightened condition so that the web part 52 cannot flap or flutter and, accordingly, cannot be heated in a none-controllable way by means of the burners 41,42. Moreover, such tightening cannot superceed a definite value, namely the value at which a sliding between the part of the web being onrolled and the roll itself will occur. According to the embodiment shown on the drawing the burner arrange¬ ment is intended to be carried and moved by the person who operates the apparatus simultaneously with the pulling of the apparatus but the apparatus may of course be provided with supporting means known per se in order to support and control the burner arrangement.

Claims: Cl aims. 1. Apparatus for onrolling web shaped material upon a substratum (28) and of the kind comprising a frame structure (I) having moving means (22), means (22,23,46) for rotatably mounting a roll (48) of the material and guiding means (12,13,14) for the web, the mounting means (22,23,46) and the guiding means (12,13,14) being so adapted that a part (52) of the web unrolled from the roll of material being onrolled is accessible for heating by means of a burner arrangement (40), c h a r a c t e r i z e d in that the mounting means (22,23,46) for the roll (48) and the guiding means (12,13,14) for the web are arranged on the frame structure in such a way that a web, when being unrolled, is moved in the upward direction from the c roll being unrolled, around the guiding means (12,13,14) and in the downward direction around the roll being unrolled, between the roll (48) and the substratum. 2. Apparatus according to claim 1, c h a r a c t e r i z e d in 0 that the frame structure (1) comprises a frame having two side frame pieces (2,3), each comprising two parts (4,5 and 6,7 respectively) forming an obtuse angle with each other, that the side frame pieces (2,3) at one of their ends (9,10) are mutually connected by means of a connecting rod (11) which rotatably supports the guiding means 5 (12,13,14) for the web, that the guiding means are shaped as rollers (12,13,14), that the side frame pieces (2,3) at the other of their ends (16,17) are mutually connected by means of an end frame piece (18) upon which wheels (19,20) are rotatably supported and that the side frame pieces (2,3), moreover, between their said one and other 0 ends (9,16 and 10,17 respectively) are provided with the means (22,23) for mounting the roll (48). 3. Apparatus according to claim 2, c h a r a c t e r i z e d in that the means for for mounting the roll comprise a bearing cavity 5 (22) in each of the side frame pieces (2,3), that the bearing cavities (22) are positioned with their openings facing away from the Vees formed by the side frame pieces (2,3) and that a pivotally or removable bearing cover (23) belongs to each bearing cavity (22). 4. Apparatus according to claim 2, c h a r a c t e r i z e d in that the moving means (27) comprise a tubular part (30) and a rod formed part (31), that one end of the rod formed part (31) is slidably inserted into the tubular part (30) and that the parts are provided with mutually corresponding holes (32,33) for receiving a connecting pin (35) in such a way that the length of the rod formed by the parts (30,31) is adjustable and that one end of the parts (30) is rigidly connected with the end frame piece (18). 5. Apparatus according to claim 4, c h a r a c t e r i z e d in that the rod (30,31) together with the parts (4,6) of the side frame pieces (2,3), which are connected by means of the connecting rod (11), form an angle diverging in direction away from the other parts (5,7) of the side frame pieces (2,3) as seen in the crosswise direction of the apparatus.

Inventors: BECK BJARNE KUFALL, HOLBEK JOHN VALDEMAR, BECK, BJARNE, KUFALL, HOLBEK, JOHN, VALDEMAR
Applicants: VILLADSENS FAB AS JENS, A/S JENS VILLADSENS FABRIKER
Application year: 1989
Main classification: E04D15
IPC codes: E04D15