hopper frame

hopper frame

A type of window frame having an upper sash (ventilator, 2) which is hinged along the bottom and opens inward; some frames of this type contain several such sashes.
References in periodicals archive ?
Limited Tenders are invited for Relocation Of Mounting Of Clamp Cylinders Used For Bag Clamping And B) Hopper Frame Modification Of Weighing Machines 1.