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AssigneeSarnafil, Inc.
InventorsJames Rubenacker, Brian Whelan, Paul Peterson, Claus Pfotenhauer
Estimating the term…
A weld wheel assembly for disposition on a membrane welding machine, and for positioning a weld wheel adjacent a nozzle hot air outlet for pressing an overlying roof membrane heated by the nozzle against an underlying roof membrane heated by the nozzle, for welding the membranes together. The assembly includes a weld wheel rotatably mounted on an axle which is moveable toward and away from the membranes, and pressure exerting structure mounted on the machine and operable to bias the axle toward the membranes during operation of the machine.
A weld wheel assembly for disposition on a roof membrane welding machine and comprising first and second weld wheels for disposition on opposite sides of an elongated fastening means and adjacent respective first and second nozzle hot air outlets and for pressing an overlying roof membrane heated by the nozzle outlets against an underlying roof membrane heated by the nozzle outlets, for welding the membranes together on the opposite sides of the fastening means, said assembly comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y…
Using hot gases or flames coming in contact with at least one of the parts to be joined: direct heating both surfaces to be joined
Single lapped joints: single lap to lap joints, i.e. overlap joints
Said joint lines being multiple and parallel or being in the form of tessellations: said joint lines being multiple and parallel, i.e. the joint…
Term ended 22 Nov 2019 (estimated)
1. Field of the Invention
The invention relates to a membrane welding machine having a nozzle for directing discrete streams of air along separated and parallel first and second paths, and is directed more particularly to a weld wheel assembly for a machine for heat welding two overlapping roof and/or waterproofing membranes to each other.
2. Description of the Prior Art
Reference is made to the accompanying drawings in which is shown an illustrative embodiment of the invention, from which its novel features and advantages will be apparent.
In the drawings:
FIG. 1 is a perspective view of a prior art roof membrane welding machine;
Referring to FIGS. 1-3, it will be seen that a machine 10 on which the invention finds particular utility comprises a frame 12 to which is fixed a handle 14 and on which are mounted wheels 16, including independent weld wheels 18. A hot air nozzle 20 is supported on the frame 12 and includes first and second outlets 22, 24 for directing two streams of hot air in spaced, generally parallel paths. A housing 26 is mounted on the frame 12 for enclosing a motor and various electrical components and controls (not shown).
The nozzle 20 is fixed to a heating element 28 which, in turn, is fixed to a blower 30 which is carried by the frame 12.
In operation, the nozzle 20 is positioned between roofing membranes A and B (FIGS. 2 and 3) with the nozzle outlets 22, 24 on either side of a fastener means F by which the membrane B is secured to a roof uppermost hard surface C. The fastener means F may comprise a batten bar 34, as shown in FIG. 2, or may comprise a series of discrete stress plates, as is known in the art. The motor in the housing 26 drives the machine 10 in the direction of arrows D. The blower 30 forces air through the heating element 28 and through the nozzle 20. As the machine moves along, jets of hot air from the nozzle 20 weld the membranes A and B together along opposite sides of the fastener means. Immediately after the hot air welds, the independent weld wheels 18 press the upper membrane against the lower membrane to secure the membranes together. A detailed description of the operation of the machine is provided in the aforementioned '828 patent.