1、Designation:F90994a(Reapproved 2011)Standard Terminology Relating toPrinters1This standard is issued under the fixed designation F909;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses in
2、dicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These terms and definitions are related to printersoperated by computers.2.Terminology2.1 Definitions:ball elementan element used in an impact printing device inwhi
3、ch the fully formed characters are located on the outersurface of a sphere-like device.Frequently called golf-ballelement.ball printeran impact printing device utilizing a ball ele-ment.The paper on the carriage remains stationary while theelement is positioned and caused to strike the paper toprodu
4、ce characters in their proper positions.band printera type of printer that employs an endless steelband containing fully formed characters.The band trans-verses the width of the paper form.Hammers strike the backof the form,synchronized in such a way as to produce thedesired characters in their prop
5、er position.barSee type bar.bar printeran impact printer in which the type slugs arecarried on a type bar.Syn.print bar.belt printera type of printer that employs an endless belt,the outer surface of which contains fully formed characters.The belt is caused to transverse the width of the paper form.
6、Hammers are caused to strike the back of the form,synchro-nized in such a way as to produce the desired characters intheir proper positions.black writea process in electrostatic printing where thephotoconductive element is charged with a charge of thesame sign as that of the toner.A light beam,used
7、like a“stylus is used to discharge only those areas that are toreceive toner to form the image.In the development process,the charged background areas repel the like charged toner tothe discharged areas on the photoconductor.chain printera type of printer that employs an endlesschain,each link of wh
8、ich contains a fully formed character.The chain is caused to transverse the width of the paperform.Hammers are caused to strike the back of the form,synchronized in such a way as to produce the desiredcharacters in their proper position.copyingthe act of producing an image on a document orother rece
9、ptor media which is a duplication of the image ofanother document,such as by a photographic,xerographic orfacsimile process or by carbon or carbonless papers.daisy wheel elementan element used in an impact printingdevice in which the fully formed characters are contained onthe ends of finger-like pr
10、ojections radiating out from thecenter of a disk,the device resembling a daisy.daisy wheel printeran impact printing device utilizing adaisy wheel element.The paper on the carriage remainsstationary while the element is positioned and caused tostrike the paper to produce the characters in their prop
11、erpositions.dielectric printing processa nonimpact printing techniquein which specially treated paper consisting of a conductivebase layer coated with a nonconductive thermoplastic mate-rial is used to hold an electric charge usually applied directlyby a set of electrode styli.The electric charge co
12、rresponds tothe latent image of the original.Following the charging step,the paper is imaged by a toner system similar to that ofelectrostatic copying devices.This technique is sometimescalled electrographic,and is currently employed on generalpurpose nonimpact printers,plotting and facsimile device
13、s.dot matrixa method of character generation in which eachcharacter is formed by a pattern of dots selected from a gridor matrix.drum printera type of printer that employs a rotatingcylinder or drum,the outer surface of which contains fullyformed characters.As the drum rotates in front of the paperf
14、orm,hammers are caused to strike the back of the formsynchronized in such a way as to produce the desiredcharacter in their proper position.electric typewritera typewriter in which an electromechani-cal device causes the type element to be activated when thekeys are struck.1This terminology is under
15、 the jurisdiction of ASTM Committee F05 onBusiness Imaging Products and is the direct responsibility of Subcommittee F05.01on Nomenclature and Definitions.Current edition approved Nov.1,2011.Published September 2012.Originallyapproved in 1985.Last previous edition approved in 2006 as F909 94a(2006).
16、DOI:10.1520/F0909-94AR11.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 electrolytic printera facsimile printing device employing amoist,electrolyte-impregnated roll-fed paper.The current(signals)is applied by feeding the paper between a stationarycontact and a revolving drum with a helical contractor.Therevolving of the drum causes the point of electrical contactbetween the blade and helical wire to move laterally acrossthe paper,on
