hopper(redirected from hopper heads)
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1. a funnel-shaped chamber or reservoir from which solid materials can be discharged under gravity into a receptacle below, esp for feeding fuel to a furnace, loading a railway truck with grain, etc.
2. any of various long-legged hopping insects, esp the grasshopper, leaf hopper, and immature locust
3. an open-topped railway truck for bulk transport of loose minerals, etc., unloaded through doors on the underside
4. Computing a device formerly used for holding punched cards and feeding them to a card punch or card reader
A funnel-shaped receptacle with an opening at the top for loading and a discharge opening at the bottom for bulk-delivering material such as grain or coal.
1. A funnel-shaped bin or chute; used to store loose construction materials, such as crushed stone or sand.
2. One of two barriers on both sides of a hopper light to prevent airflow through the side openings at the ends of the inward-sloping pivoted sash (ventilator, 2).
3. A water tank which releases its contents through a pipe at the bottom; esp. used with a water closet.
4. A water-closet bowl, esp. one that is funnel-shaped.
5.See collection hopper.
hopperA tray, or chute, that accepts input to a mechanical device, such as a disk duplicator or printer. In the days of punch cards, millions of cards were numerically or alphabetically organized by placing them into the hopper of a card sorter, taking them out of all the stackers and putting them back into the hopper for the next card column.
|In the 1940s and 1950s, millions of punch cards were placed into hoppers on IBM sorters such as this one. The hoppers were also fitted with two-foot extensions that held more cards. (Image courtesy of The Computer History Museum, www.computerhistory.org)|
|This Dataproducts laser printer holds 250 sheets of paper in the top hopper and 2,000 in the bottom. (Image courtesy of Hitachi Koki Imaging Solutions, Inc.)|