Two-String Binder Features
With this binder the point of application of the string is in a window on the left hand side of the machine. The rotating mechanisms, thread spools and tension controls are inside the box, fully protected from dripping glue.
There is a replaceable CVPC tube inside the structural steel tube. It is easily removed for cleaning out the glue residue. With the tube removed, the machine can be used for binding strips onto the Harry Boyd style heat treating fixture.
Two strings are wound in opposite directions and with equal tension thus eliminating any twisting of the blank. Since the two strings are applied directly on top of each other, at the end of the CPVC tube, it eliminates any bending force on the rod section.
There is a side to side movement of the strip when the two strings are in phase, twice per revolution. This has no effect on the blank since the strings are winding nearly on top of one another.
With a conventional 4-string binder, the point of application is between the two counter rotating mechanisms which expose the mechanism to glue drips. Also the LH application is displaced from the RH by at least ½ inch.
The mechanism is coved with a clear PlexiGlas shield to prevent inadvertent operator contact with the rotating parts. A foot switch allows two handed manipulation of the cane.
The “strings” are standard Coats & Clark 50 weight mercerized cotton quilting thread. These 1200 yard spools slip on to a nylon post and do not rotate. Thread is un-spooled from the end and routed thru a tension control. There is also an option to use A or D nylon rod guide wrapping thread.
The counter-rotating aluminum plates are drilled and taped for a second spool-tensioner assembly for customers wanting a 4-string binder.
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