US3870224A - Tape perforator - Google Patents

Tape perforator Download PDF

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Publication number
US3870224A
US3870224A US386215A US38621573A US3870224A US 3870224 A US3870224 A US 3870224A US 386215 A US386215 A US 386215A US 38621573 A US38621573 A US 38621573A US 3870224 A US3870224 A US 3870224A
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US
United States
Prior art keywords
levers
axis
punches
tape
cradle
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US386215A
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English (en)
Inventor
Leon N Canick
Charles S Aldrich
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Precision Mechanisms Corp
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Precision Mechanisms Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Precision Mechanisms Corp filed Critical Precision Mechanisms Corp
Priority to US386215A priority Critical patent/US3870224A/en
Priority to GB3169874A priority patent/GB1449305A/en
Priority to DE2436809A priority patent/DE2436809C3/de
Priority to JP49088154A priority patent/JPS5072537A/ja
Priority to CH1071974A priority patent/CH576847A5/xx
Priority to FR7427325A priority patent/FR2240088A1/fr
Application granted granted Critical
Publication of US3870224A publication Critical patent/US3870224A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/02—Methods or arrangements for marking the record carrier in digital fashion by punching

Definitions

  • pivotable cradle support the lift levers.
  • Eccentric drive crank means are used for oscillating the cradle.
  • Means are provided for positively retracting the punches after I perforation.
  • Means are also included for synchronizing Pnmary Exammer jj Master the feed of the tape with respect to the actuation of Attorney Agent or FZrm'TLeOnard Kmg the fulcrum levers so that the tape is fed only in the non-punching mode. Still other means are provided for back-spacing the tape in response to an appropriate electrical signal.
  • ABSTRACT In apparatus for perforating a length of tape, one end of each of a plurality of punches that cooperate with a die plate is removably mounted on an equal number of lift levers.
  • This invention relates generally to tape perforators and more particularly to an improved mechanism for actuating the punches thereof.
  • the present invention provides improved means for perforating a length of tape formed of paper, plastic, thin metal foil or combinations thereof that are, for example, between 0.0025 inches and 0.0045 inches thick.
  • the present invention can punch at speeds in the order of 75-100 characters per second on standard five, six, seven or eight track tapes.
  • a plurality of punches are individually mounted intermediate the ends of separate lift levers, each of which levers is pivotally mounted, at one end thereof, on a common pin that is secured to a cradle.
  • An eccentric drive link which is driven by a motor, is coupled to the cradle which is also pivotally mounted by trunnions on a fixed support.
  • the eccentric mounting of the drive link causes the ends ofthe cradle and the lift levers to oscillate and move up and down together through a predetermined length of stroke.
  • the punches will not perforate the paper since they are located approximately on the pivot axis of the cradle.
  • one of a second group of fulcrum levers is brought into an interfering relationship with the free end of the selected lift lever.
  • Continued motion of the eccentric drive link will cause the selected lift lever and its associated punch to move independently of the cradle and, in cooperation with a suitable die, to perforate the tape since the lift lever that supports the punch is prevented from .moving downwardly with the supporting cradle.
  • the fulcrum levers are balanced on a pair of knife edges and are pivoted to a position that interferes with the first lever by means of the energization of a coil. Springs provide the means for returning the fulcrum levers to their original positions. Conventional circuit means are used to actuate the coils in response to input signals that correspond to the desired sequence and pattern of perforations.
  • a second eccentrically mounted link system is supported on the same drive shaft and times the tape feed to cause advance of the tape only when the lift levers and fulcrum levers are in the nonpunching mode and the punches are below the tape slot.
  • the tape is advanced by means of a toothed feed sprocket that is driven through a ratchet motion which is responsive to the second eccentric link system.
  • a second solenoid actuated ratchet arrangement provides a backspacing function for the tape.
  • the preferred form of the present invention provides simplified means for slipping the length of tape under a tape guide and around the feed sprocket.
  • the tape guide also includes a switch for detecting a tape break or the end of the tape and stops for different widths of tape as well as a single stop that is common to all widths of tape.
  • Another object of the present invention is to provide a tape perforator, as described above, having improved means for selectively displacing one or more punches.
  • a different object of this invention is to provide tape feed timing means in combination with the tape punching means.
  • An additional object of this invention is to provide tape backspacing means in combination with the tape feed means.
  • a further object of this invention is to provide simplifled means for inserting different widths of tape into the tape feeding means.
  • FIG. 1 is a schematic, perspective view, partially broken away and with portions omitted for clarity illustrating certain structural features of the present invention
  • FIG. 1A is a fragmentary plan view of a typical length of perforated tape
  • FIG. 2 is a schematic end elevational view, partially broken away and partially in section, illustrating the structure shown in FIG. 1;
  • FIG. 3 is a fragmentary plan view, partially in section and partially in phantom, taken along line 3 -3 of FIG.
  • FIGS. 4A, 4B and 4C are schematic elevational views illustrating various positions of the structure shown in FIG. 1;
  • FIG. 5 is a sectional side elevational view of a preferred form of the present invention.
  • FIG. 6 is an end elevational view of the structure shown in FIG. 5'
  • FIG. 7 is a vertical sectional view taken along line 77 of FIG. 5; I
  • FIG. 8 is another vertical sectional view taken along line 8-8 of FIG. 5;
  • FIG. 9 is a fragmentary sectional elevational view taken along line 9--9 of FIG. 5;
  • FIG. 10 is a sectional plan view taken along line 10-10 of FIG. 5;
  • FIG. 11 is another sectional plan view taken along line 11-11 of FIG. 5;
  • FIG. 12 is a sectional elevational view taken along line 12-12 of FIG. 7;
  • FIG. 13 is a timing diagram of the apparatus comprising the present invention.
  • a shaft 20 is driven by a motor and a drive system such as meshing gears or belts and pulleys (not shown) and a crank type link 22 is mounted eccentrically on the motor driven shaft 20.
  • a cradle 24 is pivotally mounted on the link 22 and is also pivotally mounted at 26 on fixed structure to be further described hereinafter.
  • a plurality of lift levers 28 are pivotally mounted on a common transverse pin 30 that is secured to side walls of the cradle 24.
  • Each of the lift levers 28 supports a punch 32 such tha the transverse plane defined by the plurality of punches 32 is approximately coincidental with the axis 26.
  • a die plate 33 cooperates with the punches 32.
  • a pair of plates 34 that are rigidly secured to the housing of the perforator are each provided with a plurality of V-shaped notches 36 that are equal in number to the lift levers 28.
  • a fulcrum lever 38 having knife edges 40 at opposite ends thereof is mounted in each of the V-shaped notches 36.
  • a first extension 42 of each fulcrum lever 38 is positioned in close proximity with the free end of each lift lever 28 that is opposite to the pin 30.
  • a second extension 44 which acts as an armature is provided along the length of each fulcrum lever 38 and is positioned in close proximity to a coil 46 that is mounted on a bracket 48 which is part of the magnetic path.
  • Two magnetic poles 50a and 50b act as stops and in conjunction with the coil 46.
  • the bracket 48 and the armature portion of the second extension 44 compose the electromagnetic circuit.
  • a non-magnetic shim 51 provides a low permeability air gap in the magnetic circuit.
  • the neutral position of the punch 32 is below the lower plane of the tape T when the axis of the link 22 is at its lowest position with respect to the axis of the shaft 20.
  • the shaft 20 cranks the link 22, which will oscillate both the cradle 24 and the lift levers 28 as a unit about the axis 26.
  • the free end of the lift levers 28 will bypass the laterally spaced upper end of the extensions 42 as shown in FIG. 48 when the axis of the link 22 is at its highest position with respect to the axis of the shaft 20.
  • each lever 28 is provided with an auxilliary pivot 53 in the form of an'enlarged head end or projecting.
  • the end 53 of the lever 28 will bear against a fixed upper stop 54 and the punch 32 will be withdrawn as the pivoted end 30 thereof moves downwardly with the end 53 acting as the pivot axis of the affected lever 28.
  • FIG. 1A A typical length of tape T is shown in FIG. 1A.
  • a generally central line of openings 55 is punched into the tape T and is used for driving the tape T in a manner to be descrbed hereinafter.
  • the remaining openings 56 are formed by the punches 32.
  • the holes 54 may be smaller than openings 56.
  • the shaft 20 is rotatably journalled in bearings 60 and 62 that are secured within end walls 64 and 66, respectively.
  • a disc 68 is rigidly secured to the shaft 20 by means of a set screw 70.
  • the disc 68 includes a magnet 72 on the periphery thereof and a coil 74 (FIG. 11) is secured to the end wall 64 so that reference signals for the tape punch and the tapeadvance signals may be provided.
  • a variable reluctance magnetic pickup, light responsive means or other pulse generating means may be used in place of members 72 and 74.
  • the eccentric link 22 is also mounted on the shaft 20.
  • the link 22 is molded of a light weight, plastic material and is supported on the shaft 20 by means of a bearing 76 in order to minimize friction.
  • the bearing 76 is, in turn, mounted on a sleeve 78 that is secured to the shaft 20 by means of a set screw 80.
  • the rotational axes of the link 22, the bearing 76 and the sleeve 78 are concentric with respect to each other but eccentric with respect to the longitudinal axis of the shaft 20.
  • the other end of the link 22 is provided with a bearing82 that is supported on an eccentric pin 84 which is adjustably mounted within a clevis 86 formed integrally with the underside of the cradle 24.
  • the pivot pin 30 is secured to a pair of laterally spaced apart side walls 88 that are formed integrally with and extend upwardly from the cradle 24. Spacers 90 are interposed between each of the lift levers 28 and are also mounted on the pivot pin 30, as shown for example in FIG. 7.
  • a U -shaped member 92 is mounted on the end wall 64 by means of suitable fasteners and supports trunnions 94 that define the pivot axis 26 for the cradle 24.
  • a block 96 is removably secured to the support 92 by means of screws 98.
  • the punches 32 extend through accurately formed openings 100 in the block 96.
  • the lower end of each of the punches 32 is provided with a reduced diameter portion 102 and an enlarged head 104 that is received in a notch 106 formed on the upper surface of each of the lift levers 28 proximate the midpoint thereof. It should be noted at this time that the head 104 of each punch is located approximately coincidental with the pivot axis 26.
  • each of the lift levers 28 opposite the pivot pin 30 is provided with an enlarged head end 53 that defines a shoulder 108.
  • the upper end 110 of the first extension 42 of each fulcrum lever 38 is positioned in close proximity with the shoulder 108 but laterally spaced from the plane thereof.
  • a slotted guide member 112 is arranged to receive'the head end 53 of each of the lift levers 28 and a slotted guide member 114, which is secured to another end wall 116, is arranged to receive the upper end of each of the first extensions 42.
  • the first slotted guide member 112 is secured to the second slotted guide member 114 with the slots in each of these members being in alignment with each other. Normally, as shown in FIG. 4A there is a clearance C between shoulder 108 and end 110.
  • Another end wall 118 is provided in spaced, parallel oppositioned with the end wall 116.
  • the plates 34 each having the V-shaped notches 36, are secured to the walls 116 and 118, as shown for example in FIG. 5 and in FIG. 6.
  • a transverse bar 120 that is secured to the walls 116 and 118 by means of screws 122 and which contains one end of the springs 124.
  • the other end of the springs 124 are mounted on projections 125 formed integrally at both ends of each of the fulcrum levers 38 and is positioned between the confronting surfaces of each of the fulcrum levers 38 and the underside of the bar 120.
  • a second, plastic link 126 is also mounted on the shaft 20 by means of a bearing member 128.
  • a sleeve supports the bearing 128 and is secured to the shaft 20 by means of a set screw 132.
  • the rotational axes of the second link 126, the bearing 128 and the sleeve 130 are concentric with respect to each other but eccentric with respect to the longitudinal axis of the shaft 20. It should be noted at this time that the angular positions of the links 22 and 126, with respect to each other, are arranged so that the tape is fed in timed relationship with the movement of the cradle 24.
  • the link 126 is formed ofa lightweight, plastic material and supports one end of a lever 134 by means of a low friction bearing 136 and a pin 134.
  • a pin l40' is mounted in the other end of the lever 134.
  • An L- shaped bracket 142 having a U-shaped upper end 144 is slideably mounted on the pin 140.
  • the other leg. of the L-shaped bracket 142 is positioned in close proximity to the poles 146 of a pair of coils 148 which are suitably mounted on the wall 66 and which are preferably wired so that the pole faces are of opposite polarity.
  • the L-shaped bracket 142 at its opposite end is secured to a sleeve 150 which is mounted in a bearing 152.
  • a post 154 which also is secured to the end wall 66 supports the bearing 152.
  • the pin 140 also supports a first pawl 156.
  • a torsion spring 158 is wound around the pin 140 as well as around a stud 160 that is secured to the lever 134.
  • a shaft 162 is journaled on bearing means 164 that are positioned within the end walls 64 and 66.
  • the shaft 162 is generally parallel with and spaced above the shaft 20.
  • a feed sprocket 166 having a plurality of radially oriented teeth 168 formed on the periphery thereof is secured to the shaft 162 by means of a set screw 170.
  • a ratchet 172 is adjustably mounted on the shaft by means of a screw 173 that is mounted on the shaft 162.
  • the head of the screw 173 is eccentric with respect to its shank and is arranged to provide slight angular displacement of the ratchet 172 with respect to the sprocket 166.
  • the ratchet 172 is arranged to be angularly displaced in step-wise increments by means of a pawl 156.
  • a detent generally designated by the reference character 174 (FIGS. 7 and 12) is provided.
  • the detent 174 is pivotally mounted on a shaft 176 that is secured to the wall 66 and is provided with an arm 178 from which a pin 180 extends.
  • the pin 180 is arranged to engage the teeth of a second ratchet 184 that is also mounted on the shaft 162.
  • a torsion spring 186 extends between the arm 178 and an eccentric stud 188 that is pivotably in the end wall 66 to serve also as an adjustable back stop.
  • a stabilizing link 190 is pivotally connected to the second link system 126 by means of a pivot pin 192 and to the wall 66 by means of a pivot pin 194.
  • a torsion spring 196 extends between the link 190 proximate the pivot pin 194 and one arm of the L-shaped bracket 142 and serves as a return spring for the armatures of the coils 148.
  • the tape T is very easily inserted by sliding the free end thereof beneath a first cover 198 that is secured to a top plate 200.
  • the cover 198 is provided with an entrance end 202.
  • a guide arm 204 is pivotally mounted on a pin 206 that is secured to the cover 198.
  • the guide arm 204 includes a plurality of steps 208 that define guide surfaces for one longitudinal edge of different width tapes, for example ll/l6, 7/8 or 1 inch wide.
  • the other edge of the tape is guided by a surface 210 of an extension 212 that is integral with the cover 198.
  • switch 214 for detecting the end of or a break in the tape T is mounted directly below the arm 204.
  • the switch 214 is secured to the die plate 33 which in turn is secured to the extension'2l2.
  • the tape T After traversing the first cover 198 the tape T is then threaded beneath beveled inlet end 216 of die plate 33 that is positioned directly above the punches 32.
  • a cover 218 is provided to contain and guide the punched out portion or chad, ofthe tape through an outlet channel 219 as shown by the arrow in FIG. 8.
  • the tape T is then threaded over the teeth 168 of the sprocket 166 and exits the perforator comprising this invention at a bar 220 that has a curved outlet end 222.
  • a cover plate is provided for the sprocket 166.
  • the cover plate 224 is pivotally mounted on a pin 226 that is integral with one arm of a bell crank lever 228.
  • the bell crank lever 228 is provided with a rod 230 that includes a transverse stop pin 232 and a compression spring 234.
  • the rod 230 extends through a pin 236 that is journaled in the end wall 64 (FIG. 7) on a bearing 238.
  • the bell crank lever 228 and the compression spring 234, in combination with the rod 230, provides an overcenter toggle arrangement for the cover 224.
  • the cover 224 is raised in the threading operation and lowered as final take loading sequence step.
  • the backspacing structure permits a code delete operation for punching all holes and includes a coil 240 having a spring biased armature 242.
  • the coil 240 is mounted on the end wall 66 and the armature 242 thereof supports a lever 244 that is pivoted on a pin 246.
  • a pawl 248 is pivotally mounted on a pin 250 that is integral with the lever 244. It should be noted that the pawl 248 is positioned in the plane of the second ratchet 184 whose teeth are oriented in a direction that is opposite to the teeth of the first ratchet 172.
  • FIG. 13 schematically illustrates a timing chart. As shown, when 75 characters per second (cps) are perforated, one complete cycle will occur in approximately 13.33 ms. Similarly, 50 cps are perforated in approximately 20 ms while 60 cps are perforated in 16.66 ms.
  • the combination of the magnetic slug 72 on the shaft 20 and the variable reluctance magnetic pick-up 74 provides a reference signal with respect to the position of shaft 20 that the conventional circuitry for pulsing the solenoids 46 that control the actuation of the punches 32 and the solenoids 148 that control the actuation of the pawl 156.
  • the solenoids 46 and 148 each are energized for approximately 6.5 ms, there being approximately a 3.0 ms delay intermediate the energization of the solenoids 46 and 148.
  • the approximately 6.5 ms pulse to the solenoid 46 is timed to bring the fulcrum extension 42 under the end 53 of the lever 28 at or before the time that the clearance c between them is formed by the position of cradle 24.
  • the fulcrum arm 42 is maintained in place by retained magnetic force which does not end when the pulse ends and by the mechanical locking action produced by the slant of the fulcrum levers 42 and the force produced by the springs 52 acting through the lift levers 28.
  • This double action significantly adds to the reliability of the unit.
  • the tape cannot be advanced during the punching cycle because of the mechanical timing of the two eccentrics.
  • the pawl eccentric starts downward only after the punches 32 have been retracted beneath the paper slot surface.
  • the approximately 6.5 ms pulse to the solenoid 148 is timed to engage the pawl 156 with the ratchet 172 by the time the pawl 156 is on its downward stroke.
  • the tape perforator described hereinabove provides for a high degree of flexibility, reliability and quiet operation. Tape perforation speeds of up to 75 characters per second or more are available on five, six, seven and eight track tapes that may be made of paper, plastics such as mylar for example and aluminum plasticspaper combinations from 0.0025 inches to 0.0045 inches thick by either ll/l6 inch, inch or 1 inch wide.
  • the various tape widths may readily be accomadated without altering or changing the tape guide which also includes a tape break or tape end sensor.
  • Any desired character may be punched by applying a 28 volt d.c. pulse to a pulse selector bank for each hole in the character.
  • a tape advance pulse then moves the tape into a position to receive the next character.
  • Reference signals for the tape punch and tape advance signals are provided by means of a magnetic timing coil.
  • the punches are mechanically actuated only when the tape is at rest and the tape is mechanically advanced only when the punches are completely withdrawn. Broad tolerance for timing and duration of the tape punch and advance pulses is provided by mechanical storage of early pulses. Thus, neither tape punching nor tape advance can take place, even in the presence of demand pulses, until the drive shaft has moved to the correct position.
  • Positive punching and punch retraction are provided by means of crank arm and lever linkage arrangement, in combination with a positive motor drive.
  • crank arm and lever linkage arrangement in combination with a positive motor drive.
  • a tape perforator comprising:
  • a cradle pivotally mounted on a fixed support for oscillating movement about a first transverse axis
  • a first plurality of elongated lift levers pivotally mounted proximate one end thereof in said cradle for selective oscillating movement about a second, transverse axis that is substantially parallel to and spaced from said first axis;
  • a second plurality of elongated fulcrum levers equal in number to said first plurality of levers, said secondlevers being pivotable about axes that are substantially parallel to the planes of said first levers and movable between a first, non-punching mode position and a second, punching mode position whereby, in said first position of said second levers, said cradle and said first levers oscillate as a unit about said first axis and said punches are substantially devoid of movement in directions along the longitudinal axis thereof so that said punches do not perforate the tape and whereby, in said second position, said second levers interfere with the movement of said first levers so that said cradle continues to oscillate about said first axis but said first levers oscillate about said second axis to cause said punches to move longitudinally above the plane of and through the tape; and
  • the perforator in accordance with claim I further including means for positively retracting said punches in the event one of said punches becomes struck during the punching mode of operation, said retracting means comprising a fixed stop located proximate the end of said first levers that is remote from said second axis and an extension on each of said second levers, each said extension being positioned so as to interfere with and maintain said remote end of said first lever in engage ment with said fixed stop whereby continued oscillation of said cradle causes pivoting thereof about said remote lever end to thereby retract said punch.
  • said means for oscillating said cradle comprises a motor driven shaft and a first link mounted eccentrically on said shaft, said cradle being coupled to said shaft.
  • said means for advancing the tape comprises a second link mounted eccentrically on said shaft, a first ratchet and pawl assembly coupled and responsive to the movement of said second link and a sprocket driven by said ratchet, the tape having a line of perforations that are engaged by said sprocket.
  • said backspacing means comprises a second ratchet and pawl assembly coupled to said sprocket and a solenoid having an armature coupled to said second pawl.
  • the perforator in accordance with claim 10 further including means for axially displacing and changing the pitch of said tape engaging sprocket.
  • a tape perforator comprising:
  • a cradle pivotally mounted on a fixed support for oscillating movement about a first transverse axis
  • a first plurality of elongated levers pivotally mounted proximate one end thereof in said cradle for selective oscillating movement about a second, transverse axis that is substantially parallel to and spaced from said first axis;
  • second plurality of elongated levers equal in number to said first plurality of levers, said second levers being movable between a first, non-punching mode position and a second, punching mode position whereby, in said first position of said second levers, said cradle and said levers oscillate as a unit about said first axis and said punches are substantially devoid of movement in directions along the longitudinal axes thereof so that said punches do not perforate the tape and whereby, in said second levers interfere with the movement of said first levers so that said cradle continues to oscillate abut said first axis but saidfirst levers oscillate about said second axis to cause said punches to move longitudinally above the plane of and through the tape;
  • a means for positively retracting said punches in the event one of said punches becomes stuck during the punching mode of operation said retracting means comprising a fixed stop located proximate the end of said first levers that is remote from said second axis and an extension on each of said second levers, each said extension being positioned so as to interfere with and maintain said remote end of said first lever in engagement with said fixed stop whereby continued oscillation of said cradle causes pivoting thereof about said remote lever to thereby retract said punch.
  • a tape perforator comprising:
  • a cradle pivotally mounted on a fixed support for oscillating movement about a first transverse axis
  • a first plurality of elongated levers pivotally mounted proximate one end thereof in said cradle for selective oscillating movement about a second, transverse axis that is substantially parallel to and spaced from said first axis;
  • a second plurality of elongated levers equal in number to said first plurality of levers, said second levers being movable between a first, non-punching mode position and a second, punching mode position whereby, in said first position of said second levers, said cradle and said first levers oscillate as a unit about said first axis and said punches are substantially devoid of movement in directions along the longitudinal axes thereof so that said punches do not perforate the tape and whereby, in said second position, said second levers interfere with the movement of said first levers so that said cradle continues to oscillate about said first axis but said 3,870,224 11 12 first levers oscillate about said second axis to cause and said punches to move longitudinally above the h.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US386215A 1973-08-06 1973-08-06 Tape perforator Expired - Lifetime US3870224A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US386215A US3870224A (en) 1973-08-06 1973-08-06 Tape perforator
GB3169874A GB1449305A (en) 1973-08-06 1974-07-17 Tape perforator
DE2436809A DE2436809C3 (de) 1973-08-06 1974-07-31 Vorrichtung zum Stanzen von Löchern in Bänder
JP49088154A JPS5072537A (de) 1973-08-06 1974-08-02
CH1071974A CH576847A5 (de) 1973-08-06 1974-08-05
FR7427325A FR2240088A1 (de) 1973-08-06 1974-08-06

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US386215A US3870224A (en) 1973-08-06 1973-08-06 Tape perforator

Publications (1)

Publication Number Publication Date
US3870224A true US3870224A (en) 1975-03-11

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ID=23524650

Family Applications (1)

Application Number Title Priority Date Filing Date
US386215A Expired - Lifetime US3870224A (en) 1973-08-06 1973-08-06 Tape perforator

Country Status (6)

Country Link
US (1) US3870224A (de)
JP (1) JPS5072537A (de)
CH (1) CH576847A5 (de)
DE (1) DE2436809C3 (de)
FR (1) FR2240088A1 (de)
GB (1) GB1449305A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931929A (en) * 1975-03-10 1976-01-13 Canick Leon N Tape perforator
AT405336B (de) * 1996-01-08 1999-07-26 Gerum Jakob Stanz- und schneidvorrichtung für grossbilddias
CN112890436A (zh) * 2021-03-05 2021-06-04 重庆化工职业学院 基于人工智能的多功能会计专用桌

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001694A (en) * 1959-06-15 1961-09-26 Ncr Co Punching apparatus
US3556396A (en) * 1968-06-12 1971-01-19 Burroughs Corp Record processing mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001694A (en) * 1959-06-15 1961-09-26 Ncr Co Punching apparatus
US3556396A (en) * 1968-06-12 1971-01-19 Burroughs Corp Record processing mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931929A (en) * 1975-03-10 1976-01-13 Canick Leon N Tape perforator
AT405336B (de) * 1996-01-08 1999-07-26 Gerum Jakob Stanz- und schneidvorrichtung für grossbilddias
CN112890436A (zh) * 2021-03-05 2021-06-04 重庆化工职业学院 基于人工智能的多功能会计专用桌

Also Published As

Publication number Publication date
DE2436809A1 (de) 1975-02-27
GB1449305A (en) 1976-09-15
DE2436809C3 (de) 1981-01-08
FR2240088A1 (de) 1975-03-07
DE2436809B2 (de) 1980-04-24
CH576847A5 (de) 1976-06-30
JPS5072537A (de) 1975-06-16

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