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Three different international-standard two-hole punches. A hole punch, also known as hole puncher, or paper puncher, is an office tool that is used to create holes in sheets of paper, often for the purpose of collecting the sheets in a binder or folder (such collected sheets are called loose leaves).
Chad from oiled paper tape was particularly problematic, as it tended to clump and build up, rather than flowing freely into a collection container. A variation on the tape punch was a device called a Chadless Printing Reperforator. This machine would punch a received teleprinter signal into tape and print the message on it at the same time ...
[7] [8] Equipping an electric typewriter with both a paper-tape reader and punch created the basic foundation for what would become the Flexowriter. By the late 1930s, IBM had a nearly complete monopoly on unit record equipment and related punched card machinery, and expanding the product line into automatic typewriters equipped with paper tape ...
A keypunch is a device for precisely punching holes into stiff paper cards at specific locations as determined by keys struck by a human operator. Other devices included here for that same function include the gang punch, the pantograph punch, and the stamp.
Punching is a forming process that uses a punch press to force a tool, called a punch, through the workpiece to create a hole via shearing. Punching is applicable to a wide variety of materials that come in sheet form, including sheet metal, paper, vulcanized fibre and some forms of plastic sheet. The punch often passes through the work into a ...
Model 28 Tape Punch. The Model 28 Tape Punches, also known as a tape perforators, are receiving-only five-level devices that is actuated by incoming line signals and perforates standard 11/16 inch paper tape. These tape punches are self-contained and motor-driven, operating at speeds up to 100 words-per-minute.
An IBM 80-column punched card of the type most widely used in the 20th century IBM 1442 card reader/punch for 80 column cards. A computer punched card reader or just computer card reader is a computer input device used to read computer programs in either source or executable form and data from punched cards.
The paper tape reader and punch can handle eight-bit data, allowing the devices to be efficiently used to download or upload binary data for computers. [ 18 ] Earlier Teletype machine designs, such as the Model 28 ASR, had allowed the user to operate the keyboard to punch tape while independently transmitting a previously punched tape, or to ...
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