DOOR BLOK was created to solve a problem.
Back in the mid 80's, one of my fourth graders was having difficulty with our classroom door. This was the due to the fact that he was born with very short arms--almost like hands attached to his shoulders--and very short legs. And although he could function in the room, the door was a real source of frustration. He just couldn't turn the handle and then pull on the knob to open the door enough so that he could enter the room.
So I made a little device out of an old jump rope that looped from the inside knob to the outside knob. Not only did he not have to turn the knob--the rope kept the door from closing completely--he didn't have to use it all. He would just grab hold of the rope and give the door a tug. Problem solved. (Except for the 20 to 30 rope devices I ended up making for teachers who visited our room and wanted one.)
Anyway, a year or so later, I attended a seminar on classroom distractions. I was somewhat surprised to learn that the sound of the classroom door was the biggest distraction of them all. From the sound of someone rattling the knob until the sound of the door clunking shut, it is a non-stop nuisance.
Well, it didn't take long to realize that my trusty little rope thing would be the perfect solution. I just needed to come up with a simple device that didn't need to be assembled or handmade.
I played around with a few ideas and then decided to make something out of die-cut rubber.
Here's the first one I had made:
I used it for about a year before it started to stiffen and then crack. (It was made from closed-cell neoprene. Kind of the like the stuff they use for wet suits only thicker.)
I had the manufacturer switch to solid neoprene which we've been using with great success for almost twenty years. Solid neoprene is just about indestructable.
However, the original "dog bone" shape soon proved the adage that "one size doesn't really fit all." There were a lot of schools that were undergoing rennovation during which door knobs were being replaced with door handles.
End result? DOOR BLOK was not compatible with the new door hardware.
I rethought the whole thing, dumped the old die, and had a new one made.
This new and improved "cut-out" design solved the problem since it enabled DOOR BLOK to work with knobs or handles.
Note: If your classroom door has a latch guard or theft plate that covers the latch mechanism, you'll want to order DOOR BLOK XL. The extra inch in length allows it to easily reach from knob to knob.
DOOR BLOK is manufactured in Los Angeles, California by Miller Gasket. Made from 0.25" 60 durometer solid neorene, it is built to last. Since 1995, we have only had to replace about ten DOOR BLOKs due to wear.
If your classroom door uses a panic bar on the interior side of the door, you'll want to check out, LOCK BLOK.