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 1.2 And 3.2 In Product Handling Plant At Rcf Thal.