An ink ribbon or inked ribbon is an expendable assembly serving the function of transferring pigment to paper in various devices for impact printing. Since such assemblies were first widely used on typewriters, they were often called typewriter ribbons, but ink ribbons were already in use with other printing and marking devices. Ink ribbons are part of standard designs for hand- or motor-driven typewriters, teleprinters, stenotype machines, computer-driven printers, and many mechanical calculators. Thousands of varieties of ink ribbons and ribbon cartridges have been produced, and are available from stationery suppliers.
The prototypical assembly consists of a length of a medium, either pigment-impregnated woven ribbon or pigment-coated polymer tape, and a transport mechanism involving two axles. At any given moment, most of the length of the medium is wound as a close-spaced spiral around one axle or the other, tight enough for friction among turns to make it behave mostly like a solid cylinder. Rotation of the axles moves the ribbon or tape after each impact and usually aids in maintaining tension along the roughly straight-line path of the medium between the axles. The assembly may itself include mechanisms that control the tension in the temporarily unwound portion of the medium, or the typewriter/printer ribbon-advance mechanism may control the tension.
Some typewriter ribbons have two different colored pigments (usually black and red) running in parallel along the length of the ribbon. These ribbons are used with typewriters which have a selection lever ("bichrome ribbon switch") to slightly raise or lower the ribbon, so the typebars will print either color, as desired. [1]
Woven fabric typewriter ribbons were the first kind to be developed. With them, the pigment is an ink that dries on typing paper but not on the ribbon, and the ribbon is mounted at each end to a flanged reel whose hub engages with one of the axles. Only the axle onto which the ribbon is winding is driven, and the ribbon assembly is intended to work with an axle-driving mechanism that reverses the direction of rotation when the undriven axle reaches the point where there is almost no ribbon left wound around it.
Thus, the full length of the ribbon shuttles back and forth between reels, and each position along it is struck twice in each cycle of the ribbon's motion (once in the right-to-left phase and once in the left-to-right). This process can proceed indefinitely, until a depleting ink supply causes the typed characters to become unacceptably faint. Reversal of the ribbon was often controlled manually in early machines, [2] but automatic reversal mechanisms became popular later.
An operator who judges a ribbon's ink supply to be too depleted typically manually winds the whole ribbon onto the fuller reel, releasing it from the empty one, and discarding the ribbon and the reel it is wound on. It is replaced with a new ribbon that is purchased already wound on a single compatible reel. Typically the attachment between reel and ribbon involves one grommet at each end of the ribbon that pierces the ribbon and engages with a hook on the hub of the corresponding reel. There often is a small grommet or eyelet near each end of the ribbon, which activates an automatic ribbon-reversal feature of the ribbon-advance mechanism. [3]
An alternative design encloses two pre-threaded spools within a single disposable ribbon cartridge, eliminating the need to manually thread a messy ink ribbon. Cartridge designs are often used with higher-speed automatic printers, or ribbons with multiple inks used for color printing. Heavy-duty high-speed line printers may use wider ink ribbons, ranging up to the full width of a 132-column printout, nominally 14 inches (360 mm).
Another alternative design omits the spools, and simply stuffs inked ribbon into a plastic box through a narrow vertical slot, pulling it out the other end as needed. The box and ribbon are proportioned to avoid tangling inside the box. The ends of the ribbon are joined in an endless loop, so that a ribbon reversing mechanism is not needed. Some of these spool-less cartridge designs make a half-twist in the ribbon before joining it up into a loop, resulting in a Mobius strip. This is done as a method to distribute wear and ink depletion more evenly throughout the ribbon, to make it last longer.
Ink-depleted fabric ribbons can be re-inked to allow re-use, [4] [1] but this may be a messy procedure; many used fabric ribbons are instead discarded, along with the spool which they were wound around, or as part of a cartridge assembly. The de facto standard width of typewriter ribbons is 0.5 inches (13 mm), [3] but some ribbon spools are no longer manufactured, requiring owners of vintage machines to re-ink used ribbons and/or to re-spool new ribbon onto their vintage spools. [5]
The IBM Selectric typewriter required ribbons of polymer (plastic) tape and popularized their use, even with other manufacturers. This type of ribbon is sometimes called a "carbon ribbon".
With this newer medium, the entire impacted area of the pigment coating adheres to the paper and transfers from the ribbon, producing typed copy with greater uniformity of character shape, reflecting a sharper contrast between the unmarked paper and the pigmented characters compared to cloth ribbons. This produces a clearer, easier-to-read printed image which looks more "professional" in printed documents.
However, the full-depth transfer of the pigment renders multiple passes over the same length of the ribbon unworkable, so the assembly is discarded after a single pass through its length. Because polymer tape is much thinner and more easily tangled than cloth ribbon, it usually is packaged in an enclosed cartridge with two spools, eliminating the need to manually thread a delicate ribbon onto an empty spool.
Deducing what has been typed by inspection of the used ribbon is far more practicable and reliable than with a cloth ribbon, so some users ensure secure destruction (shredding) of discarded one-time ribbons in order to prevent unintended disclosure of typed documents.
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There were many different schemes to supply ink to early typewriters, including ink-soaked rollers, ink pads, and rubberized cloth strips. [5] Eventually, ink ribbons emerged as the de facto standard method of supplying ink for impact printers of all types. [1]
In computing, a printer is a peripheral machine which makes a persistent representation of graphics or text, usually on paper. While most output is human-readable, bar code printers are an example of an expanded use for printers. Different types of printers include 3D printers, inkjet printers, laser printers, and thermal printers.
A typewriter is a mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of keys, and each one causes a different single character to be produced on paper by striking an inked ribbon selectively against the paper with a type element. At the end of the nineteenth century, the term 'typewriter' was also applied to a person who used such a device.
Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper and plastic substrates. Inkjet printers were the most commonly used type of printer in 2008, and range from small inexpensive consumer models to expensive professional machines. By 2019, laser printers outsold inkjet printers by nearly a 2:1 ratio, 9.6% vs 5.1% of all computer peripherals.As of 2023, sublimation printers have outsold inkjet printers by nearly a 2:1 ratio, accounting for 9.6% of all computer peripherals, compared to 5.1% for inkjet printers.
Dye-sublimation printing is a term that covers several distinct digital computer printing techniques that involve using heat to transfer dye onto a substrate.
Stationery refers to commercially manufactured writing materials, including cut paper, envelopes, writing implements, continuous form paper, and other office supplies. Stationery includes materials to be written on by hand or by equipment such as computer printers.
Carbon paper consists of sheets of paper that create one or more copies simultaneously with the creation of an original document when inscribed by a typewriter or ballpoint pen.
Wire recording, also known as magnetic wire recording, was the first magnetic recording technology, an analog type of audio storage. It recorded sound signals on a thin steel wire using varying levels of magnetization. The first crude magnetic recorder was invented in 1898 by Valdemar Poulsen. The first magnetic recorder to be made commercially available anywhere was the Telegraphone, manufactured by the American Telegraphone Company, Springfield, Massachusetts in 1903.
Thermal-transfer printing is a digital printing method in which material is applied to paper by melting a coating of ribbon so that it stays glued to the material on which the print is applied. It contrasts with direct thermal printing, where no ribbon is present in the process.
The IBM 1403 line printer was introduced as part of the IBM 1401 computer in 1959 and had an especially long life in the IBM product line.
The Friden Flexowriter produced by the Friden Calculating Machine Company, was a teleprinter, a heavy-duty electric typewriter capable of being driven not only by a human typing, but also automatically by several methods, including direct attachment to a computer and by use of paper tape.
A reel is a device used to store elongated and flexible objects by wrapping the material around a cylindrical core known as a spool. Many reels also have flanges around the ends of the spool to help retain the wrapped material and prevent unwanted slippage off the ends. In most cases, the reel spool is hollow in order to pass an axle and allow it to spin like a wheel — a winding process known as reeling, which can be done by manually turning the reel with handles or cranks, or by machine-powered rotating via motors.
The Teletype Model 33 is an electromechanical teleprinter designed for light-duty office use. It is less rugged and cost less than earlier Teletype machines. The Teletype Corporation introduced the Model 33 as a commercial product in 1963; the machine had originally been designed for the United States Navy. There are three versions of the Model 33:
A label printer is a computer printer that prints on self-adhesive label material and/or card-stock (tags). A label printer with built-in keyboard and display for stand-alone use is often called a label maker. Label printers are different from ordinary printers because they need to have special feed mechanisms to handle rolled stock, or tear sheet (fanfold) stock. Common connectivity for label printers include RS-232 serial, Universal Serial Bus (USB), parallel, Ethernet and various kinds of wireless. Label printers have a wide variety of applications, including supply chain management, retail price marking, packaging labels, blood and laboratory specimen marking, and fixed assets management.
Wide format printers are generally accepted to be any computer-controlled printing machines (printers) that support a maximum print roll width of between 18 and 100 inches. Printers with capacities over 100 in wide are considered super-wide or grand format. Wide-format printers are used to print banners, posters, trade show graphics, wallpaper, murals, backlit film (duratrans), vehicle image wraps, electronic circuit schematics, architectural drawings, construction plans, backdrops for theatrical and media sets, and any other large format artwork or signage. Wide-format printers usually employ some variant of inkjet or toner-based technology to produce the printed image; and are more economical than other print methods such as screen printing for most short-run print projects, depending on print size, run length, and the type of substrate or print medium. Wide-format printers are usually designed for printing onto a roll of print media that feeds incrementally during the print process, rather than onto individual sheets.
A loop bin duplicator is a specialized audio tape machine used in the duplication of pre-recorded audio cassettes and 8-track cartridges.
Vinyl banners are a form of banners made of vinyl. The most commonly used material is PVC. Most banners are now digitally printed on large format inkjet printers which are capable of printing a full color outdoor billboard on a single piece of material. They are used for outdoor advertising.
Magnetic-tape data storage is a system for storing digital information on magnetic tape using digital recording.
The RCA tape cartridge is a magnetic tape audio format that was designed to offer stereo quarter-inch reel-to-reel tape recording quality in a convenient format for the consumer market. It was introduced in 1958, following four years of development. This timing coincided with the launch of the stereophonic phonograph record. It was introduced to the market by RCA in 1958.
The Olivetti company, an Italian manufacturer of computers, tablets, smartphones, printers and other such business products as calculators and fax machines, was founded as a typewriters manufacturer by Camillo Olivetti in 1908 in the Turin commune of Ivrea, Italy.
The IBM Selectric was a highly successful line of electric typewriters introduced by IBM on 31 July 1961.