The Martin Yale 1812 automatic, friction-fed paper folder is a smooth, efficient machine with such a simple design that anyone, from church volunteers to business professionals, can use it. To operate the 1812, all the user has to do is adjust the folding plates according to the convenient measurement chart located on the front of the machine, and then insert the paper. It accepts a large range of paper weight without requiring an adjustment to the feed system, which saves time between folding jobs. Up to 90 lb paper can be handled. Like most friction-fed machines, the 1812 is not compatible with coated or glossy types of paper