Patent Publication Number: US-2019169924-A1

Title: Method and device for sealing insulated glass blanks

Description:
The invention relates to a method and a device for sealing insulating glass blanks. 
     It is known and—during production of insulating glass—common to fill with sealing compound the edge joint—that is open to the outside and that lies in an insulating glass blank between the glass panes and outside of the spacer—of insulating glass blanks consisting of at least two glass panes with a spacer that is attached in-between and that is connected to the glass panes in order to achieve the ultimate interconnection of glass panes of insulating glass. 
     During sealing, i.e., while the edge joint of insulating glass blanks is being filled with sealing compound, the sealing compound is introduced into the edge joint from at least one filling nozzle, which is moved along the edge joint of the insulating glass blank. 
     Methods and devices for sealing insulating glass blanks are known. 
     For example, reference is made to AT 511 084 A4, EP 0 337 978 A, FR 25 60 813 A, EP 0 252 066 A, GB-A-20 16 960, DE-OS 28 46 785, DE 29 07 210 A1, DE 28 16 437 B1, and EP 0 391 884 A1. 
     Known from EP 0 391 884 A1 is a method for sealing insulating glass blanks, in which the movement of the filling nozzle relative to the insulating glass blank is regulated based on the output of sealing compound and on the depth of the edge joint. In this case, the relative speed of the relative movement between insulating glass blank and filling nozzle is changed in such a way that the desired extent of the filling of the edge joint remains constant even in the case of changing depth of the edge joint and/or changing output of sealing compound. 
     Described in DE 29 07 210 A1 is a method for sealing insulating glass blanks, in which reducing the feed of sealing compound always takes place simultaneously with the slowing of the movement of the insulating glass blank. 
     In particular, in the known method for sealing insulating glass blanks, it is problematic to transport the insulating glass blanks during and after sealing since sealing compound—as long as it has not yet hardened—is very sticky and clogs transport means, which clamp onto the (lower) edge of the insulating glass blank. In order to solve this problem, various proposals for conveying means have been made. By way of example, reference is made to AT 384 596 B, EP 0 122 405 A, EP 0 857 848 A, and DE 34 00 031 C. 
     Both during sealing of insulating glass blanks with a filling nozzle (“one-nozzle sealing machine”) and during sealing of insulating glass blanks with more than one filling nozzle, in particular with two filling nozzles (“two-nozzle sealing machine”), the movements between the at least one filling nozzle and the insulating glass blank, in order to move the filling nozzle along the edge joint, are achieved by moving the insulating glass blank in the horizontal direction (parallel to the conveying direction of the insulating glass blank) and moving the filling nozzle in the vertical direction (crosswise to the conveying direction of the insulating glass blank). Thus, the insulating glass blank is moved linearly during the filling of edge joints with gaps parallel to the transport direction, and the filling nozzle in the case of the stationary insulating glass blank is moved crosswise to the conveying direction when edge joints oriented crosswise to the conveying direction are to be filled. 
     In the case of known devices, the filling nozzle can be moved on a beam that is oriented crosswise to the conveying direction, which beam is fastened in a non-adjustable manner on the machine frame in the conveying direction. This also applies for devices with two filling nozzles. In the case of the known sealing machines, the filling nozzle or the filling nozzles cannot be moved in the conveying direction of the insulating glass blank. 
     Also known is a method for sealing insulating glass blanks (“Erdmann Method”) using a one-nozzle sealing machine. 
     The one-nozzle sealing machine by Erdmann with the type designation “7500 Series Vertical IG Secondary Sealer” is arranged in an insulating glass line of the “Erdmann Vertical Insulating Glass (IF) Line” type (cf. www.youtube.com/watch?v=GlwRurxOtVo, uploaded on Oct. 2, 2010). The sealing machine has a support wall for insulating glass blanks that is formed from several beams mounted in a stationary manner in the machine frame and equipped with free-wheeling rollers. On the lower edge of the support wall, linear conveyors are provided in the form of conveyor belts with lateral guide rollers (on the intake side) and in the form of conveyor rollers (on the discharge side). The intake-side linear conveyor is lowered during execution of the sealing. Between the intake-side linear conveyor and the lowermost beam of the support wall equipped with rollers, suction heads that can be adjusted back and forth crosswise to the support wall are provided as holding systems for the insulating glass blank that is to be sealed. The suction heads can be attached to an insulating glass blank that is to be sealed. During sealing, the insulating glass blank is held exclusively by the suction heads, which are arranged in the support wall, so that the edges of the insulating glass blank are free and the sealing nozzle can be moved around the latter along the four edges of the insulating glass blank, while sealing compound is filled into the edge joint of the insulating glass blank. One support finger is assigned to each suction head. The support fingers can be pivoted around horizontal swivel axes independently of one another from a readiness position into an approximately horizontal operating position. When a triple-insulating glass blank is to be sealed, a support finger is pivoted upward from below adjacent to the lower edge of the insulating glass blank. The support finger is pivoted downward when the sealing nozzle is moved during sealing along the lower edge of the insulating glass blank. 
     In the case of the known methods for sealing and in the devices that are proposed in this respect, it is problematic that because of the filling nozzle/filling nozzles that cannot be adjusted or moved in the conveying direction, the movement of the insulating glass blank through a sealing station during sealing of edge joints, which run crosswise to the direction of movement of the insulating glass blank, has to be interrupted and resumed again. This extends the cycle time because of the braking and acceleration of the insulating glass blank. This problem occurs in particular in the case of large and heavy insulating glass blanks. 
     The object of the invention is to configure the sealing of insulating glass blanks in such a way that the drawbacks that arise during sealing due to the braking and accelerating of insulating glass blanks no longer exist. 
     This object is achieved according to the invention with a method with the features of claim  1 , on the one hand, and with a device that has the features of the independent claim directed toward the device, on the other hand. 
     Preferred and advantageous configurations of the invention are the subject matter of the subclaims. 
     The basic idea of the invention is that the at least one filling nozzle is moved during the sealing, in particular at least during individual sections of the sealing, parallel to the direction in which the insulating glass blank is moved during the sealing. The filling nozzle can be moved during the sealing in the same direction as the insulating glass blank that is to be sealed or in the opposite direction. 
     In a possible embodiment of the method according to the invention, it is provided to move the insulating glass blank, which is to be sealed, continuously during the sealing, whereby the at least one filling nozzle is moved with the insulating glass blank when areas of the edge joint of the insulating glass blank that are not parallel to the direction of movement (conveying direction) of the insulating glass blank are sealed. 
     In the case of the invention, the problems connected with the slowing-down (braking) and accelerating of the insulating glass blank that is to be sealed no longer exist. 
     In certain cases, it can occur that the insulating glass blank is (briefly) halted during the sealing. Such a case exists, for example, when long (large) insulating glass blanks are to be sealed in the conveying direction. In such cases, the area in which the filling nozzle can be moved in the conveying direction may be too short, so that the filling nozzle is at the end of its area of movement before the section of the edge joint of the insulating glass blank that is to be filled with sealing compound and is oriented crosswise to the conveying direction is filled (sealed). This only occurs in exceptional cases, however. 
     Usually, the method according to the invention makes it possible for the insulating glass blank according to a preferred embodiment of the method to be moved in the conveying direction continuously optionally at various high speeds. 
     It also allows the possibility provided according to the invention of moving the filling nozzle also in the conveying direction so that in the case of small insulating glass blanks, the procedure is that only the filling nozzle is moved and the insulating glass blank is not moved or moves only slightly in the conveying direction. 
     Within the scope of the invention, consideration is also given to changing the speed at which the filling nozzle is moved in order to match it to the circumstances prevailing in each case (size of the insulating glass blank, cross-sectional size of the edge joint of the insulating glass blank). The speed of the movements of the filling nozzle both in the conveying direction and crosswise to the conveying direction must not be constant, but rather can be changed within the scope of the invention even during a sealing process. 
     In the case of the invention, the possibilities are allowed of changing not only the speed at which the insulating glass blank is moved (in the conveying direction), but also the speed at which the filling nozzle is moved, of changing in particular independently of one another, so that cycle times are optimized and the (horizontal) dimensions of the sealing station are reduced, without the advantages of the invention being lost. 
     Another advantage of the invention consists in matching the cycle times of the method according to the invention and the device according to the invention to the capacities of upstream and downstream system parts without having an adverse effect on the quality of the sealing of insulating glass blanks. This has the effect that no dust develops in the system parts (e.g., gas-filling presses) upstream in the sealing station, since the sealing takes too long, on the one hand, and downstream system parts (e.g., stacking systems) do not have to hold onto sealed insulating glass blanks, i.e., finished insulating glass, on the other hand. 
     During sealing of parallel sections of edge joints or (“oblique”) sections of edge joints that are arranged at an angle other than a right angle to the conveying direction, the necessary relative movement between the filling nozzle and the insulating glass blank can be achieved by only the insulating glass blank being moved or by both the insulating glass blank and the filling nozzle being moved in the conveying direction at speeds that are different from one another. 
     When filling sections of the edge joint that are parallel to the conveying direction, the filling nozzle is not moved crosswise to the conveying direction. 
     When “oblique” or “curved” sections of the edge joint are to be filled with sealing compound, the filling nozzle is moved crosswise to the conveying direction in order to follow the “oblique” or “curved” section of the edge joint. 
     One advantage of the procedure that is proposed according to the invention during sealing of insulating glass blanks also lies in the fact that the passive adjustment of the amount of sealing compound, which is released from the filling nozzle into the edge joint per time unit, can be compensated by the swift adjustment in speed of the movements of the filling nozzle and/or the insulating glass blank. 
     Another advantage of the method according to the invention and the device according to the invention lies in the fact that the movements of the insulating glass blank that are required in the state of the art, without the latter being sealed (“idling”), in order to align the latter correctly for sealing relative to the at least one filling nozzle, are superfluous. 
     In one embodiment of the method of the invention, it can be provided that the insulating glass blank, while it is being sealed, is moved continuously in one direction (conveying direction). 
     In one embodiment of the method of the invention, it can be provided that the at least one filling nozzle is stopped in the conveying direction during the introduction of sealing compound into sections of the edge joint of the insulating glass blank, which are oriented parallel to the conveying direction, or is moved at a speed V 2  that is different from the speed V 1  of the movement of the insulating glass blank. 
     In one embodiment of the method of the invention, it can be provided that the at least one filling nozzle is moved in the conveying direction and in addition crosswise to the conveying direction while the sealing compound is being introduced into sections of the edge joint oriented crosswise to the conveying direction at the same speed V 2  as the insulating glass blank. 
     In one embodiment of the method of the invention, it can be provided that the at least one filling nozzle is moved crosswise to the conveying direction in addition to its movement parallel to the conveying direction during the introduction of filling compound into sections of the edge joint, which form an angle in the conveying direction. 
     In one embodiment of the method of the invention, it can be provided that a single filling nozzle is used, from which in succession sealing compound is introduced into all sections of the edge joint of an insulating glass blank. 
     In one embodiment of the method of the invention, it can be provided that the at least one filling nozzle is moved in the conveying direction at a speed V 2  while sealing compound is being introduced into a section of the edge joint oriented parallel to the conveying direction, which speed is different from the speed V 1  of the movement of the insulating glass blank, in particular higher, in such a way that the filling nozzle, relative to the conveying direction, moves from one end of the section of the edge joint to the other end of the section of the edge joint. 
     In one embodiment of the method of the invention, it can be provided that two filling nozzles are used. 
     In one embodiment of the method of the invention, it can be provided that one of the filling nozzles introduces sealing compound only into the section of the edge joint that extends parallel to the conveying direction and is adjacent to the conveying system, and the second filling nozzle introduces sealing compound into the other section of the edge joint of the insulating glass blank. 
     In one embodiment of the method of the invention, it can be provided that the first and the second filling nozzle simultaneously introduce sealing compound into sections of the edge joint of the insulating glass blank that are oriented parallel or at an oblique angle to the conveying direction. 
     In one embodiment of the method of the invention, it can be provided that the insulating glass blank during the introduction of sealing compound in the conveying direction is moved at various high speeds V 1 . 
     In one embodiment of the method of the invention, it can be provided that the insulating glass blank is held during the bringing in or removal and during the sealing by suction devices that are loaded with underpres sure placed on a surface of a first glass pane of the insulating glass blank, and the second glass pane of the insulating glass blank is supported by support elements that clamp onto it exclusively from below. 
     In one embodiment of the method of the invention, it can be provided that the support elements that clamp onto the second glass pane of the insulating glass blank in the area of the at least one filling nozzle are removed from the second glass pane of the insulating glass blank. 
     In one embodiment of the method of the invention, it can be provided that the support elements on the second glass pane of the insulating glass blank lie before and after the filling nozzle, which introduces sealing compound into the lower, horizontal section of the edge joint of the insulating glass blank. 
     In one embodiment of the device of the invention, it can be provided that the conveying system for the insulating glass blank is equipped for continuous conveying of the insulating glass blank during the entire sealing. 
     In one embodiment of the device of the invention, it can be provided that the conveying system comprises a linear conveyor that clamps onto the lower edge of the insulating glass blank and a roller beam that is provided in the area of the upper edge of the insulating glass blank. 
     In one embodiment of the device of the invention, it can be provided that the linear conveyor comprises suction devices and support elements, which can be moved together and synchronously in the conveying direction of the insulating glass blank. 
     In one embodiment of the device of the invention, it can be provided that the suction devices laterally clamp onto the surface of one glass pane of the insulating glass blank, which surface faces the machine frame of the device, and the support elements clamp—from below—onto the glass pane of the insulating glass blank that faces away from the machine frame of the device. 
     In one embodiment of the device of the invention, it can be provided that support elements in the area of the filling nozzle can be removed from the lower edge of the glass pane of the insulating glass blank. 
     In one embodiment of the device of the invention, it can be provided that the support elements have a support head and a bendable support arm. 
     In one embodiment of the device of the invention, it can be provided that an actuating element for bending the support arm of the support elements is assigned to the nozzle head that has the at least one filling nozzle. 
     In one embodiment of the device of the invention, it can be provided that the suction devices and the support elements of the linear conveyor, combined into conveyor units, are arranged on a carrier. 
     In one embodiment of the device of the invention, it can be provided that the suction devices and the support elements are guided onto a continuous, self-contained conveyor track. 
     In one embodiment of the device of the invention, it can be provided that the at least one filling nozzle is arranged on a sealing head, which can be adjusted on a beam crosswise to the conveying direction, and the beam, which carries the sealing head, can be moved parallel to the conveying direction of the insulating glass blank. 
     In one embodiment of the device of the invention, it can be provided that the beam for introducing sealing compound into sections of the edge joint of the insulating glass blank that are tilted in the conveying direction can be moved synchronously with the insulating glass blank in the conveying direction. 
    
    
     
       Further details and features of the invention follow from the description below of preferred embodiments based on the drawings. Here: 
         FIG. 1  diagrammatically shows steps during sealing of an insulating glass blank with a filling nozzle, 
         FIG. 2  diagrammatically shows steps during sealing of an insulating glass blank with two filling nozzles, 
         FIG. 3  shows a first embodiment in oblique view, 
         FIG. 4  shows a front view of the device from  FIG. 3 , 
         FIG. 5  shows a side view of the device from  FIG. 3 , 
         FIG. 6  shows a top view of the device from  FIG. 3 , 
         FIG. 7  shows a second embodiment in oblique view, 
         FIG. 8  shows the second embodiment in front view, 
         FIG. 9  shows the second embodiment in side view, 
         FIG. 10  shows the second embodiment in top view, 
         FIG. 11  shows in (partial) oblique view the embodiment, shown in  FIGS. 7 to 10 , with a modified configuration of the support elements, and 
         FIG. 12  shows three support elements with an actuating link. 
     
    
    
     The description below describes the sealing of insulating glass blanks, which are moved (transported) during sealing, as now commonly used, essentially oriented vertically through a sealing device (sealing station). Not withstanding the above, the method according to the invention is not limited to the sealing of insulating glass blanks that are oriented vertically during sealing. Rather, insulating glass blanks that are moved horizontally by a sealing device can also be sealed with the method according to the invention. 
     In the method according to the invention, for example, the procedure can be as follows: First, the lower, horizontal section  13 , parallel to the conveying direction, of the edge joint of the insulating glass blank  1  is filled, whereby the insulating glass blank  1  is moved continuously. The filling nozzle  7  can be moved parallel to the conveying direction (arrow  17 ) of the insulating glass blank  1  at a speed other than the speed of the insulating glass blank  1 . In this case, the filling nozzle  7  must not be moved, however. 
     Then, the rear (vertical) section  9  of the edge joint of the insulating glass blank  1 , where said section is oriented crosswise to the conveying direction, relative to the conveying direction, is filled, whereby the beam  5  with the filling nozzle  7  (sealing nozzle) is moved synchronously with the insulating glass blank  1 , and the filling nozzle  7  for filling the rear section  9  of the edge joint is moved downward or upward along the beam  5 . 
     When the upper, horizontal section  11  of the edge joint of the insulating glass blank  1  is being filled, the insulating glass blank  1  in addition is moved continuously in order to achieve a relative movement between filling nozzle  7  and insulating glass blank  1 . The filling nozzle  7  can be moved parallel to the conveying direction (arrow  17 ) of the insulating glass blank  1  at a speed other than the speed of the insulating glass blank  1 , but does not have to be moved. 
     For filling the front (vertical) section  3  of the edge joint, oriented crosswise to the conveying direction, the procedure is as described in connection with the filling of the rear section  9  of the edge joint of the insulating glass blank  1 . 
     When filling sections of the edge joint, which are oriented parallel to the conveying direction (arrow  17 ) of the insulating glass blank  1 , the filling nozzle  7  can be moved onto the sealing head  19 , and the filling nozzle  7  shown in  FIG. 2  can be stopped on the sealing head  21  (V 2 =0) or can be moved at a speed (V 2 ), which is different from the speed (V 1 ), at which the insulating glass blank  1  is moved (V 2 ≠V 1 ). This also applies for sections of the edge joint of the insulating glass blank  1 , which are oriented obliquely to the conveying direction (arrow  17 ), whereby while oblique sections of the edge joint are being filled, the filling nozzle  7  is moved along the beam  5  so that it follows this section of the edge joint. Correspondingly, the procedure can be carried out while curved sections of the edge joint of an insulating glass blank are being filled. 
     The movement of the sealing head  19  with the filling nozzle  7  (and also of the optionally provided second sealing head  21  with the filling nozzle  7 ) in conveying direction (arrow  17 ) is carried out by moving the beam  5 . 
     For example, when the sealing station  15  has (only) one filling nozzle  7  ( FIG. 1 ), the procedure can be as follows: 
     1 st  Step: 
     The insulating glass blank  1  is moved by a conveying system  25  at a speed V 1  in the direction of the arrow  17  through the sealing station  15 . In the case of, for example, a stationary beam  5  (V 2 =0) or with a beam  5  that is moved at a speed V 2  other than speed V 1 , and in the case of a sealing head  19  that is stopped in the direction of the lengthwise extension of the beam  5  with the filling nozzle  7 , the filling nozzle  7  fills the lower, horizontal section  13  of the edge joint of the insulating glass blank  1 . 
     2 nd  Step: 
     The insulating glass blank  1  moves forward at a speed V 1  in the direction of the arrow  17  through the sealing station  15 . At the same time, the beam  5  with the sealing head  19  moves synchronously with the insulating glass blank  1  at the speed V 2  and in the same direction (arrow  17 ) as the latter, whereby V 1 =V 2  applies. In this case, the sealing head  19  with the filling nozzle  7  travels along the rear, vertical section  9  of the edge joint upward (arrow  42 ) relative to the conveying direction (arrow  17 ) and fills the section  9 . 
     3 rd  Step: 
     The insulating glass blank  1  is moved forward in the direction of the arrow  17  at a speed V 1 . 
     The beam  5  with the sealing head  19  is moved in the direction of the arrow  17  at a speed V 2 , which is unlike, in particular higher, than that of the insulating glass blank  1  (V 2 &gt;V 1 ), whereby the filling nozzle  7 —because of the difference in speeds V 1  and V 2  at which the insulating glass blank  1  and the beam  5  are moved—moves along the upper horizontal section  11  of the edge joint of the insulating glass blank  1  and fills the latter with sealing compound. 
     When the upper section  11  of the edge joint of the insulating glass blank  1  is oriented obliquely to the conveying direction (arrow  17 ) or curved, the sealing head  19  with the filling nozzle  7  is moved in addition along the beam  5 , so that the filling nozzle  7  follows the oblique or curved section  11  of the edge joint. In this case, the beam  5  can be moved in addition in (or against the) conveying direction (arrow  17 ) (in this case, V 2 ≠V 1  applies). 
     4 th  Step: 
     The insulating glass blank  1  is moved forward in the sealing station  15  by the conveying system  25  and continuously at a speed V 1  in the direction of the arrow  17 . 
     At the same time, the beam  5  with the sealing head  19  is moved with the filling nozzle  7  synchronously with the insulating glass blank  1  and at the speed V 2  in the same direction (arrow  17 ), whereby V 1 =V 2  applies. In this case, the sealing head  19  travels with the filling nozzle  7  along the beam  5  downward (arrow  42 ) and fills the front, vertical section  3  of the edge joint of the insulating glass blank  1  relative to the conveying direction (arrow  17 ). 
     When a sealing station  15  with two filling nozzles  7  is used for sealing insulating glass blanks, the procedure can be as is described below relative to  FIG. 2 : 
     1 st  Step: 
     An insulating glass blank  1  is moved by the conveying system  25  into the sealing station  15  at a speed V 1  in the direction of the arrow  17 . At the same time, the beam  5  with two sealing heads  19  and  21  (the sealing head  21  can also be attached in the machine frame of the sealing station  15 ) with one filling nozzle  7  each is moved synchronously with the insulating glass blank  1  and in the same direction (arrow  17 ) as that at the speed V 2 , whereby V 1 =V 2  applies. The sealing head  19  with its filling nozzle  7  travels along the beam  5  upward (arrow  42 ) and fills the front, vertical section  3  of the edge joint of the insulating glass blank  1 , relative to the conveying direction (arrow  17 ), with sealing compound. The second sealing head  21  remains inactive in this step. 
     2 nd  Step: 
     The insulating glass blank  1  is continuously moved forward in the direction of the arrow  17  at a speed V 1 . The beam  5  with the sealing head  19  and the sealing head  21  is stopped (V 2 =0) or is moved at a speed V 2  other than speed V 1 (V 2 ≠V 1 ); the filling nozzle  7  of the sealing head  19  fills the upper section  11  of the edge joint, and the filling nozzle  7  of the second sealing head  21  fills the lower section  13  of the edge joint of the insulating glass blank  1  with sealing compound. 
     When the upper section  11  of the edge joint of the insulating glass blank  1  is oriented obliquely to the conveying direction (arrow  17 ) or is curved, the sealing head  19  with the filling nozzle  7  is moved along the beam  5  in such a way that the filling nozzle  7  of the edge joint also follows the oblique or curved section  11 . In this case, the beam  5  can be moved in addition in (or against) the conveying direction (arrow  17 ) (in this case, V 2 ≠V 1  applies). 
     3 rd  Step: 
     The insulating glass blank  1  is moved continuously at a speed V 1  in the direction of the arrow  17 . The beam  5  with the sealing heads  19  and  21  is moved at the speed V 2  in the direction of the arrow  17  and synchronously with the insulating glass blank  1 . In this case, V 1 =V 2  applies. 
     At the same time, the sealing head  19  with the filling nozzle  7 , which last filled the upper section  11  of the edge joint, travels downward along the beam  5  (arrow  42 ) and fills the rear section  9 , relative to the conveying direction (arrow  17 ), of the edge joint of the insulating glass blank  1  with sealing compound. In this step, the sealing head  21  is inactive. 
     Both in the procedure according to  FIG. 1  (“one-nozzle sealing machine”) and in the procedure according to  FIG. 2  (“two-nozzle sealing machine”), the speed V 1  at which the insulating glass blank  1  is moved through the sealing station  15  during sealing does not have to be the same in all sections (steps) of the method. It is only essential that the insulating glass blank  1 —except in the cases explained above—not remain standing during the sealing, and the beam  5  with the at least one sealing head  19  is moved in (or against) the conveying direction, for example synchronously with the insulating glass blank  1 , during sealing of sections of the edge joint oriented crosswise or at an oblique angle to the conveying direction, which sections start from the lower, horizontal section  13  of the edge joint, such as, for example, the sections  3  and  9  of the edge joint. 
     The method according to the invention is also suitable for the sealing of so-called shape disks, i.e., insulating glass blanks  1  with shapes other than rectangular or square (with at least one “oblique” and/or curved edge), as has been further explained above with reference to the procedures shown in  FIGS. 1 and 2 . 
     The exemplary embodiment of a device according to the invention (sealing station  15 ), shown in  FIGS. 3 to 6 , comprises a machine frame  23 , in and on which the various system parts are arranged. 
     In the machine frame  23 , a conveying system  25  for insulating glass blanks  1  that are to be sealed is provided. The conveying system  25  comprises suction devices  27  and support elements  29  that are assigned to the suction devices  27 . In this case, it is provided that the suction devices  27  clamp onto the rear surfaces, facing the machine frame  23 , of one glass pane  33  of an insulating glass blank  1  and clamp the support elements  29  on the lower edge (only) of the front glass pane  31  of the insulating glass blank  1  facing away from the machine frame  23 . Thus, a movement (dropping) of the front glass pane  31  relative to the rear glass pane  33  of the insulating glass blank  1 , held by the suction devices  27 , is prevented. In addition, parts of the conveying system  25  are prevented from coming into contact with and contaminating the sealing compound introduced into the edge joint of an insulating glass blank  1 . Moreover, the device  15  is also suitable for sealing insulating glass blanks  1  for stepped elements (the glass panes of the insulating glass blank  1  are not the same size). 
     The upper edge of the insulating glass blank  1  is supported by a roller beam  35 , which clamps onto the rear surface of the glass pane  33  and is arranged such that it can be adjusted depending on height in the machine frame  23  so that it can be adjusted crosswise to the conveying direction (arrow  17 ) in such a way that it clamps onto the insulating glass blank  1  (only) in the area of the upper edge. 
     The conveying system  25  of the first embodiment ( FIGS. 3 to 6 ) comprises three conveying units  37  with five suction devices  27  in each case and support elements  29  assigned thereto, which elements are mounted on the same carrier  39 , as the top view of  FIG. 6  shows in particular. The height orientation of the support heads  30  of the support elements  29  can be adjusted correspondingly to the position of the lower edge of the front glass pane  31  of the insulating glass blank  1 . 
     The conveying units  37 , comprising suction devices  27  and support elements  29 , are moved in a circuit (arrow  40  in  FIG. 6 ), in such a way that in each case only the currently required conveying unit  37  is moved in the conveying plane of the insulating glass blank  1 . As soon as an insulating glass blank  1  has been sealed and removed, the conveying unit  37 , as is shown on the right in  FIG. 6 , is moved back toward the rear and again to the intake side of the sealing station  15 . 
     The support elements  29  are designed in such a way that their support heads  30  can be dropped so that they do not prevent the filling (sealing) of the insulating glass blank  1  by the filling nozzle  7  when the lower, horizontal section  13  of the edge joint of an insulating glass blank  1  is sealed. 
     For example, the support elements  29  are designed in such a way that their support heads  30  in the area of the filling nozzle  7  are dropped by an actuating element  49 —assigned to the sealing head  19  with filling nozzle  7 —into the position that is shown in the front view ( FIG. 4 ). To this end, articulated levers  51  of the support elements  29 , which lie in operating position with their support heads  30  on the lower edge of the front glass pane  31  of the insulating glass blank  1 , are bent. In the active position, which the support elements  29  occupy when they are not in the area of a filling nozzle  7 , the articulated levers  51  are extended. The articulated levers  51  are designed in such a way that they do not bend under the weight of the front glass pane  31  of the insulating glass blank  1 , but rather only bend when force is exerted by the actuating element  49  in the area of the joint  53  of an articulated lever  51  on the latter. 
     The sealing nozzle  7  is guided to move back and forth via a sealing head  19  on the essentially vertical beam  5  (arrow  42 ). The beam  5  itself can be moved along the machine frame  23  in the horizontal direction, i.e., parallel to the conveying direction (arrow  17 ). 
     To this end, the beam  5  is mounted to be able to move with its lower end on a rail  43  that is arranged in front of the sealing station  15 . In addition, the beam  5  is guided to be able to move over a cantilever  45  on a guide rail  47  that is fastened onto the upper edge of the machine frame  23 . 
     Since the beam  5 , on which the sealing head  19  with its filling nozzle  7  is guided to be able to move back and forth (arrow  42 ), can be moved in the conveying direction (horizontal, double arrow  41 ), it can be entrained with the latter while sections of the edge joint of the insulating glass blank  1  are being sealed. 
     This makes possible the procedure according to the invention in which the insulating-glass blank  1  during the sealing in the sealing station  15  does not remain standing, but rather is moved constantly. The relative movements between the sealing head  19  with filling nozzle  7  and the edge joint of the insulating glass blank  1  are achieved by moving the insulating glass blank  1  using the conveying system  25  and step-by-step (intermittent) movement of the filling nozzle  7  both crosswise to the conveying direction (double arrow  42 ) and in the horizontal direction (double arrow  41 ) in or against the conveying direction (arrow  17  of  FIGS. 1 and 2 ). 
     The embodiment of a device according to the invention (sealing station)  15 , shown in  FIGS. 7 to 10 , operates in principle just like the embodiment that is shown in  FIGS. 3 to 6 . In the embodiment shown in  FIGS. 7 to 10 , the suction devices  27  and support elements  29  forming the conveying system  25  are run on a circular track  55  along a self-contained path (arrow  56  in  FIG. 10 ). In the area of the front section  57  of the track  55  lying parallel to the conveying plane, the suction devices  27  and support elements  29  are effective for the transport of insulating glass blanks  1  during sealing. In the embodiments shown in  FIGS. 7 to 10 , one support element  29  is assigned to each suction device  27 . 
     In the embodiment of the sealing station  15  according to the invention, shown in  FIG. 11 , support elements  29  that are changed relative to the embodiment of the support elements  29 , shown in  FIGS. 7 to 10 , are provided. The embodiment of the support elements  29  shown in  FIGS. 11 and 12  can also be provided in the case of the embodiment of the sealing station  15  according to the invention, shown in  FIGS. 3 to 6 . 
     The support elements  29  of  FIGS. 11 and 12  have levers  61  mounted to pivot on a base plate  60 , which levers carry the support head  30  to pivot on their free ends. Between the base plate  60  and the levers  61 , an articulated lever  51  is provided with its joint  53  formed by an axis  62 . An arm  64  is fastened to the axis  62  of the joint  53 . Between the free end of the arm  64  and the base plate  60 , a tension spring  65  is provided. The tension spring  65  loads the arm  64  in such a way that the articulated lever  51  is moved into operating position, shown in  FIG. 12  on the right and left, with a raised support head  30  of the support element  29 . This position of the articulated lever  51  is preferably a stable upper dead center position. 
     In the embodiment of the support elements  29 , shown in  FIGS. 11 and 12 , as an actuating element  49 , an actuating link  66  is arranged on the sealing head  19 . The actuating link  66  clamps onto an actuating roller  67 , which is arranged on the axis  62  of the articulating lever  51 , and produces a buckling of the articulated lever  51  in the position, shown in the center of  FIG. 12 , with a lowered support head  30  because of the relative movement between the sealing head  19  and the support element  29 , symbolized by an arrow  68  in  FIG. 12 . As soon as the actuating link  66  no longer clamps onto a support element  29 , more precisely its actuating roller  67 —when the support element  29  is thus no longer in the area of the filling nozzle  7  that is arranged on the sealing head  19  (or on the sealing head  21 )—the actuating lever  51  under the action of the tension spring  65  again occupies its operating position with a raised support head  30 . 
     On the release side, the conveying system  25  for insulating glass blanks  1  that are to be sealed in the embodiment shown in  FIGS. 3 to 6  can, just like the embodiment shown in  FIGS. 7 to 10  (on the right in  FIG. 3  and in  FIG. 7 ), be extended enough to convey sealed insulating glass blanks  1  far enough away from the sealing station  15  that insulating glass blanks  1 , which have been sealed, can be easily removed for stacking. 
     In summary, an embodiment of the invention can be described as follows: 
     During sealing of insulating glass blanks  1 , the insulating glass blank  1  is moved essentially continuously through a sealing station  15 . When sections  3 ,  9  of the edge joint of the insulating glass blank  1  that are oriented crosswise or obliquely to the conveying direction (arrow  17 ) are filled with sealing compound that exits from a filling nozzle  7 , the filling nozzle  7  is also moved in the conveying direction (arrow  17 ). When sealing compound from the filling nozzle  7  is introduced into the sections  11 ,  13  of the insulating glass blank  1  parallel to the conveying direction (arrow  17 ), the filling nozzle  7  is not moved in the conveying direction (arrow  17 ) or is moved at a speed other than the speed at which the insulating glass blank  1  is moved.