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US 4,119,058 AGranted
Glue applicators
OwnerAlfred Schmermundinventor
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OwnerAlfred Schmermundinventor
Estimating the term…
There is disclosed a glue applicator which essentially consists of a housing provided with an applicator nozzle, with valve means, and with a passage to conduct glue to the nozzle, the valve means being interposed between the passage and the nozzle and comprising a valve slide slidable in a bore in the housing to control communication between the passage and the nozzle. By movement of an article past the nozzle, a glue coating in strip form can be applied to the article. The housing may also include means for storing, heating and pressure feeding the glue, and suction means connectable to the nozzle to suck glue back up the nozzle when the supply from the passage is interrupted by the valve slide. The applicator may have a number of such nozzles, controlled either by a single valve slide or by a number of such valve slides. Also disclosed is glue equipment comprising a glue applicator of the above-mentioned kind and a control system for controlling a supply of a pressure medium, such as compressed air, to pressure feed glue to the nozzle or nozzles of the applicator. Finally, there is disclosed gluing apparatus comprising the applicator in multi-valve form and actuating means firstly to actuate the valve slides of the applicator independently of each other and cyclically during operation of the apparatus, and secondly to actuate the valve slides to close all of the nozzles when the apparatus is stopped. The applicator can be arranged so that the part of its housing with the valve slides and nozzles can be uncoupled from the actuating means and removed from the rest of the apparatus.
A glue applicator comprising a housing provided with an applicator nozzle, with valve means, and with a passage to conduct glue to the nozzle, the valve means being interposed between the passage and the nozzle and comprising a bore in the housing, a valve slide slidable in said bore to control communication between the passage and the nozzle, the valve slide being provided with a conduit and with a closure surface so arranged that in a first position of the valve slide communication between the passage and the nozzle is provided by the conduit and in a second position of the valve slide the closure surface closes at least one of the passage and the nozzle, and surfaces defining a cavity in the valve slide, the valve slide being provided with a channel which, in said second position of the valve slide, communicates with the nozzle and said cavity, said surfaces being relatively moved, on movement of the valve slide into said second position, to so increase the volume of said cavity as to create a partial vacuum therein to suck glue from the nozzle into said channel, and being relatively moved, on movement of the valve slide into said first position, to so decrease the volume of said cavity as to create a pressure to expel glue from said channel back into the nozzle.
A glue applicator comprising a housing provided with an applicator nozzle, with valve means, and with a passage to conduct glue to the nozzle, the valve means being interposed between the passage and the nozzle and comprising a bore in the housing, a valve slide slidable in said bore to control communication between the passage and the nozzle, the applicator housing being provided with one such nozzle and slide valve or with a plurality of such nozzles and one or more such slide valves, and a control system for controlling a supply of a pressure medium to pressure feed glue to the or each nozzle, the control system comprising a conduit, which is connectable to a source of the pressure medium and which is arranged to supply the pressure medium to the applicator, a control valve, which is arranged in said conduit and which is adapted to open and close said conduit on respectively starting and stopping of a drive for the equipment, a bypass duct connected to said conduit to bypass the control valve, and a bypass valve arranged in the bypass duct and actuable to open the bypass duct when said drive is stationary.
A glue applicator comprising a housing provided with a plurality of applicator nozzles arranged at spacings to provide parallel glue strips, and with a corresponding plurality of passages respectively associated with the nozzles to conduct glue thereto, a plurality of bores in the housing, a plurality of valve slides each interposed between a respective one of the passages and at least one of the nozzles and slidable in a respective one of said bores to control the supply of glue to at least one respective one of the nozzles, and actuating means to actuate the valve slides of the applicator, said actuating means comprising first drive means to actuate the valve slides independently of each other and cyclically during operation of the apparatus, and second drive means to actuate the valve slides to close all of the nozzles of the applicator when operation of the apparatus is discontinued.
Dependencies are inferred from the claim text.