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Gemini Sign Letter Sets
Rigid Sign Letter Track
Letter Changing Poles and Accessories

Gemini flat plastic changeable sign letters. Clear acrylic sign letters are precision injection molded to a .080" thickness. These sign letters will not warp or blow away under nearly all conditions. Raised edges prevent scratching. Rigid Sign Letters.
Rigid Sign Letter Track

Rigid Sign Letter Track for Gemini Pronto and Wagner Zip Change Letters.
Gemini Pronto Letter Changing PoleGemini Pronto Letter Changing Poles - for rigid sign letters.
Pronto Sign Track Installation
Accurate spacing is the key to a good Pronto changeable letter system. Refer to the diagram shown here to select the method of track installation you prefer and determine the total height of your sign. The use of dual track automatically spaces the rows and reduces the number of bars required. If row spacing needs to be greater use a combination of top and bottom tracks.
If the surface you are attaching Pronto Track onto will expand and contract at somewhat the same rate as the plastic track, installation can be done using either rivets or adhesive. Using a chalk line and level, mark the location for your first bar of track.
For a rivet installation: drill a hole through the track and background (maximum 8" center to center). To fasten track to 1/8" - 3/16" background, drill .1875 diameter hole (3/16" drill bit). Insert the Pronto rivet, then push the pin to its closed position. (Drill at a minimum of 1800 RPM using a #11 drill bit with a 30º angle and 0º rake.)
For an adhesive installation: using a syringe or bottle applicator with a thin needle tip, apply a steady line of adhesive, such as WELD-ON #3 or #4, to the back face of the bar of track.  Tape in place until adhesive has set up completely.
If the surface you are attaching Pronto track onto will not expand or contract (ie. wood or metal) at the same rate as the plastic track, we recommend the following installation procedure:
  1. Drill or route horizontal oblong or oversized holes in the track.
  2. Using a sheet metal screw, because of its squared shoulder; put the screw in the center of the horizontal
  3. Do not tighten the screw. Leave it approximately 1/4 to 1/2 turn loose.
  4. When all the screws are in the track you should be able to wiggle horizontally a small distance.
  5. Now the track is able to expand or contract with temperature changes, and shouldn’t buckle or warp.
The diagram above shows the 2 different methods of installing 2 lines of letters. The example on the left used both a Pronto Top Track and Pronto Bottom Track to increase the space between rows of letters. The example on the right uses a single bar of Pronto Dual Track. (Visible space for the letters is not drawn to scale.)  The table above will help you determine the total visible opening for your sign, based on the number of lines of text used. For example, using a 4 inch letter with a visible space of 4-1/4", the total height of a sign with 3 rows of letters will be 18-1/4". These measurements are based on using the Pronto Dual Track between rows.