US3358918A - Paper feed mechanism for a printing calculating or like machine - Google Patents

Paper feed mechanism for a printing calculating or like machine Download PDF

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Publication number
US3358918A
US3358918A US541625A US54162566A US3358918A US 3358918 A US3358918 A US 3358918A US 541625 A US541625 A US 541625A US 54162566 A US54162566 A US 54162566A US 3358918 A US3358918 A US 3358918A
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United States
Prior art keywords
printing
locking member
ratchet wheel
paper
line
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Expired - Lifetime
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US541625A
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English (en)
Inventor
Gassino Teresio
Bertino Lorenzino
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Olivetti SpA
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/76—Line-spacing mechanisms
    • B41J19/78—Positive-feed mechanisms
    • B41J19/80—Pawl-and-ratchet mechanisms
    • B41J19/82—Pawl-and-ratchet mechanisms moving a paper or like carriage
    • B41J19/84—Pawl-and-ratchet mechanisms moving a paper or like carriage in the form of a roller rotated for line spacing

Definitions

  • GASSINO ETAL PAPER FEED MECHANISM FOR A PRINTING CALCULATING OR LIKE MACHINE Filed April 11, 1966 2 Sheets-Sheet l Dec. 19, 1967 T.
  • GASSINO ETAL PAPER FEED MECHANISM FOR A PRINTING CALCULATING OR LIKE MACHINE Filed April 11, 1966 2 Sheets-Sheet 2 INVENTORS TERESIO GASSINO LORENZINO BERTINO BY 2%;-
  • a paper feed mechanism for a printing machine comprises a platen rotated before the printing in one direction retracting said paper to a printing position and rotated after the printing in the opposite direction advancing the paper to a reading position.
  • the platen is secured to a ratchet wheel engaged by a spring urged locking member reciprocable to rotate the platen.
  • An intercepting member arrests the ratchet wheel after being rotated to the printing position while the locking member continues its stroke at least one line farther. After printing, the intercepting member releases the ratchet wheel, and the locking member rotates the platen in the opposite direction advancing the last printed line to the reading position.
  • This invention relates to a paper feed mechanism for a printing calculating or like machine, comprising a platen adapted to be rotated before the printing in a predetermined direction a plurality of line spaces for retracting said paper and to be rotated after the printing in an opposite direction for advancing said paper at least one line space farther than said plurality of line spaces and a ratchet wheel bodily rotatable with said platen and normally locked by a spring urged locking member.
  • the paper feed mechanism which is characterized by cyclically operating means for moving said locking member through a predetermined forward stroke before the printing, said locking member being adapted to rotate yieldably said ratchet wheel in said predetermined direction, an intercepting member being provided for arrest ing said ratchet wheel after being rotated said plurality of line spaces in said predetermined direction, while said locking member completes said forward stroke independently from said ratchet wheel, restoring means being effective after the printing for returning said locking member through a rearward stroke equal to said forward stroke to rotate said ratchet wheel in said opposite direction said farther line space.
  • FIG. 1 is a left hand longitudinal partial sectional view of a paper feed mechanism according to the invention embodied in a printing calculating machine;
  • FIG. 2 is a partial front view of the mechanism
  • FIG. 3 is a left hand longitudinal sectional view taken according to the line IIIIII of FIG. 2;
  • FIG. 4 is a left hand longitudinal sectional view taken according to the line IV-IV of FIG. 2;
  • FIG. 5 is a left hand longitudinal view of a detail of the mechanism
  • FIG. 6 is a longitudinal view of another detail of the mechanism.
  • the numeral 11 indicates a conventional platen 11 secured to a shaft 12 rotatably mounted on the machine frame and adapted to support a paper strip 10.
  • a printing device compris'mg a set of slides 16, each one carrying a typewheel 13, is adapted to print simultaneously on the paper 10 under the control of a universal bar 17 reciprocated in a known manner by a cyclically rotating shaft 18, which represents the main shaft of the machine.
  • a pinion 14 Secured to each typewheel 13 is a pinion 14 steadily engaged by a vertical rack 15, the movement of which is controlled by a corresponding actuator not shown in the drawings.
  • a tearing ruler 19 (FIG. 2) having a pin 22 cooperating with a toothed slot 20 provided on the paper release frame 21 and adapted to be transversely displaced by manually operating a lug 23 integral with the ruler 19.
  • the upper edge of the ruler 19 is provided with a set of projections 24 adapted to provide the cut edge of the paper with a set of notches.
  • the projections 24 are distanced according to three typewheels 13 to facilitate the reading of the printed amount by subdividing the same in groups of orders.
  • a cam 26 (FIG. 1) adapted to cooperate with a bail 27 fulcrumed on a stationary shaft 28.
  • a link 31 which is provided with an arcuate slot 32 engaged by a pin 33 of a lever 36 rotatably mounted on the shaft 12.
  • the slot 32 has a predetermined length corresponding, for instance, to five line spaces.
  • the lever 36 is urged by a spring 37 to cause the pin 33 to contact the lower edge of said slot 32 as shown in FIG. 1.
  • a pivot 41 pivotally mounting a locking member 42 which is urged by a spring 44 to engage a ratchet wheel 46 intergral with a sleeve 47 secured to the shaft 12.
  • the teeth of the wheel 46 have a pitch corresponding to a line space.
  • Fulcrumed on the pivot 41 is also a second locking member 43 (FIG. 4) urged by a spring 48 to engage one of three notches 49, 50, 51 provided on a cam shaped sector 52 idly mounted on the shaft 12. Normally, the member 43 engages the intermediate notch 50 as shown in FIG. 4.
  • a lever 53 (FIG. 1) is adapted to be manually or automatically located in one of a pair of positions according to the character of the operation of the machine, i.e. whether it is a printing cycle or a non-printing cycle, in a known manner and is provided with a pin 54 adapted to cooperate with a shoulder 56 of a slide 57.
  • a pin 63 locates the slide 62 in the position of FIG. 1, whereas in the total taking printing cycles the pin 63 is displaced rearwards in a known manner to cause the slides 62 and 57 to be moved rearwards.
  • the slide 57 is linked with a lever 64 fulcrumed on a stationary shaft 67 and is provided with a pin 69 engaging a slot 71 provided on a forked slide 72.
  • the slide 72 is fulcrumed on an arm 73 of the bail 27, and is also proa vided with font shoulders 74, 76 and 77, 78 two by two symmetrically located with respect to the stationary shaft 67.
  • the shoulders 74, 76, and the shoulders 77, 78 respectively, are adapted to cooperate with a pair of lugs 79 and 81 of a lever 82 fulcrumed on the stationary shaft '67.
  • the lever 82 is connected through a rod 84 (FIG. 4) to the sector 52.
  • the paper feed mechanism comprises an intercepting lever 87 fulcrumed on the shaft 67 and having a bent lug 86' and urged by a spring 88 to Contact the sector 52.
  • the bent lug 86 is normally located at a distance from a slope 89 of the sector 52 corresponding to four line spaces.
  • a bail 93 Fulcrumed on the shaft 67 is also a bail 93 (FIG. 3) having a first lug 92 adapted to cooperate with a ratchet Wheel 91 similar to the wheel 46 and integral with the sleeve 47, so that both the wheels 46 and 91 are bodily rotatable with the shaft 12. Furthermore the bail 93 is provided with a second bent lug 95 urged by a spring 94 to sense the paper 10 above the upper edge of the tearing ruler 19.
  • the paper 10 may be introduced into a conventional paper-guide frame 96 (FIG. 5) secured to a shaft 116 rotatably mounted on the machine frame. Secured to the shaft 116 is also a lever 117 having a pin 118 urged by a spring 122 to contact a cam shaped edge of the frame 21 comprising a tapered portion 119 and a horizontal portion 120.
  • the frame 96 is provided with a pair of notches engaging a shaft 97 secured to three paper feed rollers 98. Secured to the shaft 97 is also a pinion 99 (FIG. 6) meshing with a pinion 101 provided with two radial opposite projections 107 (FIG.
  • the pinion 101 is rotatably mounted on a hub 109 integral with an arm 108 (FIG. 6) provided with a slot 111 entered by the shaft 12.
  • the arm 108 is also provided with a circular hole 112 entered by a circular disk 110 integral with the pinion 99.
  • the paper feed mechanism operates as follows:
  • the lever 53 (FIG. 1), the slides 57 and 62 remain in the shown position and the lever 64 is not rocked.
  • the cam 26 rocks clockwise the bail 27, thus displacing the link 31 and the slide 72 upwards, but the lugs 79 and 81 are not affected by the slide 72. Therefore the sector 52 (FIG. 4) remains in the position shown on FIG. 4.
  • the link 31 (FIG. 1) rocks the lever 36 clockwise together with the rod 41, whereby the two locking members 42 and 43 (FIG. 4) are rotated clockwise.
  • the locking member 42 (FIG. 1) yieldably rotates the ratchet wheel 46 clockwise bodily with the sleeve 47 and the platen 11, whereas the locking member 43 (FIG. 4) yieldably rotates the sector 52 clockwise.
  • the slope 89 of the sector 52 causes the lug 86 of the lever 87 to engage a tooth of the ratchet wheel 46, thus locking the shaft 12, the platen 11 and the paper (FIG. 2) while the two locking members 42 and 43 and the sector 52 are rotated a further line space, the locking member 42 tripping a tooth on the wheel 46.
  • the paper 10 has been thus retracted four line' spaces, while the locking member 42 completes its stroke of five line spaces, independently from the ratchet wheel 46.
  • the cyclically operating means 31, 36 are adapted to reciprocate the locking member 42 through a predetermined stroke to rotate yieldably the ratchet wheel 46 clockwise to retract the paper four line spaces, and then to advance same five line spaces and that the intercepting member 86 (FIG. 4) locks the ratchet wheel after being rotated said four line spaces in the retracting direction.
  • the frame 21 When the paper is to be introduced between the paperguide-frame 96 and the platen 11 (FIG. 5), the frame 21 is manually displaced forwards bodily with the tearing ruler 19 by sliding with a pair of slots 125 on the universal bar 17. The portion edge 119 of the frame 21 causes the arm 117 to rock against the urge of the spring 122, whereby the paper-guide frame 96 is removed from the platen 11 bodily with the arm 117 and the rollers 98.
  • the frame 21 is held in the forwards displaced position by the arm 117 which engages the horizontal edge 120 of the frame 21. After the introduction of the paper a printing cycle may be started without returning the frame 21 rearwards. In fact, immediately before the printing of the typewheels 13, the universal bar is moved rearwards and automatically restores the frame rearwards.
  • a paper feed mechanism for a printing calculating or like machine having a platen adapted to be rotated before the printing in a predetermined direction a plurality of line spaces for retracting said paper and to be rotated after the printing in an opposite direction for advancing said paper at least one line space farther than said plurality of line spaces, a ratchet wheel bodily rotatable with said platen, and a spring urged locking member normally locking said ratchet wheel, the combination comprising:
  • a paper feed mechanism for a printing calculating or like machine having a platen adapted to be rotated before the printing in a predetermined direction a plurality of line spaces for retracting said paper and to be rotated after the printing in an opposite direction for advancing said paper at least one line space farther than said plurality of line spaces, a ratchet wheel bodily rotatable with said platen, and a first spring urged locking member normally locking said ratchet wheel, the combination comprising:
  • a paper feed mechanism for a printing calculating or like machine having a platen adapted to be rotated before the printing in a predetermined direction a plurality of line spaces for retracting said paper and to be rotated after the printing in an opposite direction for advancing said paper at least one line space farther than said plurality of line spaces, a ratchet wheel bodily rotatable with said platen, and a first spring urged lock- 5 ing member normally locking said ratchet wheel, the
  • an intercepting member being provided for arresting said ratchet wheel after being rotated said plurality of line spaces in said predetermined direction
  • said first locking member being adapted to complete said forward stroke independently from said ratchet wheel
  • a paper feed mechanism for a printing calculating or like machine having a platen adapted to be rotated before the printing in a predetermined direction a plurality of line spaces for retracting said paper and to be rotated after the printing in an opposite direction for advancing said paper at least one line space farther than said plurality of line spaces, a ratchet wheel bodily rotatable with said platen, and by a first spring urged locking member normally locking said ratchet wheel, the combination comprising:
  • a paper feed mechanism for a printing calculating or like machine having a platen adapted to be rotated in a predetermined direction a plurality of line spaces for retracting said paper and to be rotated after the printing in an opposite direction for advancing said paper at least one line space farther than said plurality of line spaces, a ratchet wheel bodily rotatable with said platen, and a spring urged locking member normally locking said ratchet wheel, the combination comprising:
  • a paper feed mechanism for a printing calculating or like machine having a platen adapted to be rotated in a predetermined direction a plurality of line spaces for retracting said paper and to be rotated after the printing in an opposite direction for advancing said paper at least one line space farther than said plurality of line spaces, paper feed rollers yieldably contacting said platen, a ratchet Wheel bodily rotatable with said platen, and a spring urged locking member normally locking said ratchet wheel, the combination comprising:

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US541625A 1965-04-10 1966-04-11 Paper feed mechanism for a printing calculating or like machine Expired - Lifetime US3358918A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT894365 1965-04-10

Publications (1)

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US3358918A true US3358918A (en) 1967-12-19

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Application Number Title Priority Date Filing Date
US541625A Expired - Lifetime US3358918A (en) 1965-04-10 1966-04-11 Paper feed mechanism for a printing calculating or like machine

Country Status (6)

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US (1) US3358918A (fr)
BE (1) BE679270A (fr)
CH (1) CH434829A (fr)
DE (1) DE1524053A1 (fr)
FR (1) FR1475475A (fr)
GB (1) GB1136015A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3616994A (en) * 1968-06-07 1971-11-02 Tokyo Electric Co Ltd Printing device in a recording calculator or the like

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297743A (en) * 1936-08-22 1942-10-06 Ibm Paper feeding device
US3075626A (en) * 1960-02-04 1963-01-29 Victor Adding Machine Co Record tape feed mechanism for business machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297743A (en) * 1936-08-22 1942-10-06 Ibm Paper feeding device
US3075626A (en) * 1960-02-04 1963-01-29 Victor Adding Machine Co Record tape feed mechanism for business machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3616994A (en) * 1968-06-07 1971-11-02 Tokyo Electric Co Ltd Printing device in a recording calculator or the like

Also Published As

Publication number Publication date
BE679270A (fr) 1966-09-16
DE1524053A1 (de) 1969-11-27
GB1136015A (en) 1968-12-11
CH434829A (fr) 1967-04-30
FR1475475A (fr) 1967-03-31

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