Patent ES-381149-A1 (ES)
Title: Printer mechanism
IPC: G07G1/06
Filed: 1970-06-25
Abstract: During one cycle of machine operation corresponding to an amount-entering operation in a cash register or similar accounting machine record material is fed from an initial position, at which the next print line is viewable, to a printing position, returned to the initial position after printing, and thence fed through the line-spacing distance towards the printing position. Both of the above distances may be adjustable. The machine described is released for operation by the insertion of a record slip from the left on to slip table 24, Fig. 5, which rocks arm 90 and frees the key lock line 96. When an amount-entering operation is performed cam shaft 77, carrying various cams controlling the slip feeding mechanism is cycled through 360 degrees. Initially a stud 75 on cam 76 rocks arm 74, Fig. 7, coupled to latch retainer 65, releasing link 46 to the action of spring 47, which moves to the right and rotates arms 34 anti-clockwise about pivot 33 to bring feed roll 37 into contact with the record slip opposite pressure roll 88. A pitman 44, Fig. 3, is rotatably and slidably mounted on shafts 33, 41 by means of slots 98, 39 and carries a rack 43 engaging pinion 42, mounted on shaft 41 and geared to feed roll 37 (see also Fig. 11, not reproduced) and is connected to a drive link 102. As the arms 34 rotate the pitman is also rotated about shaft 33. A slide 121 is carried on a rotatably mounted arm 116 and has a flange 123 normally urged by spring 142 into contact with a cut-out portion 124 of the pitman. As the pitman is rotated the slide is urged to follow until the flange 123 is engaged by lip 138 of latch 136, pivoted at 135 and also urged anti-clockwise by spring 142, Fig. 7. A selecting plate 113, is mounted on shaft 84 and positioned by the depression of an amount-entering key to align notch 115 with stud 114 and permit rotation of lever arm 107 as cam 110 rotates, thus urging pitman 44 to the left through arm 105 and drive 102, Figs. 3 and 6. Feed roll 37 is rotated anticlockwise by the movement of the pitman, feeding the strip to the right and at the full extent of this movement the amount entered is printed on the appropriate line of the strip. During this movement of the pitman its top surface engages a flange 140 of latch member 136 and rocks it anti-clockwise enabling spring 142 to rotate slide 121 and engage flange 123 against the bottom of the pitman, Fig. 6. Cam 110 then rocks arm 107 clockwise to return the pitman and strip to the initial position and flange 123 re-engages the cut-out portion 124 of the pitman, but is now positioned above the lip 138 of the latch member 136. Latch retainer 65 is rocked clockwise again by another mechanism (Fig. 4, not shown) when, if selecting plate (83) is suitably positioned, cam 76 permits arm (71), with stud (70) bearing on the retainer, to rotate under the action of spring (81), thus preventing latching engagement when the link 46 is moved to the left in a subsequent part of the operation. Pitman 44 is again released for movement to the left by cam 110 but this time the flange 123 coacts with cut-out 124 and limits the movement to that corresponding to the line-spacing distance. At this position a slip-retaining arm (144) is brought into contact with the strip by means of a cam (146) (Fig. 10, not shown). Link 46 is restored to its leftward home position when cam (62) (Fig. 8, not shown) releases lever arm 54, Fig. 7, to the action of spring (63). This movement removes the feed roll 37 from the slip and is followed by cam 110 permitting the return of pitman 44 to its home position. The disengagement of feed roll 37 also rotates the pitman and allows the latch member 136 to re-engage the flange 123 of slide 121. Cam (62) then causes the return of link 46 to its rightward home position moving the feed roll into contact with the strip followed by cam 76 permitting the anti-clockwise rotation of latch retainer 65 under the action of spring (67) until the retainer rests on stud 72 of link 46, but is not in latching engagement as the link is in its rightward home position. Finally the slip retaining arm is moved out of contact with the slip which is now in position for a further printing operation. Controlling feed distances.-The first feed distance is controlled by a slide 131, Fig. 3, with a flange 132 situated in slot 98 of the pitman slidably mounted on shaft 33 and adjustably positioned by means of a screw 134 and screw-threaded block 127 on arm 126 of the pitman. The second feed distance is adjusted by moving the slide 121 relative to the arm 116 by means of screw 125 and screw-threaded block 120. Total-taking operation.-When a total-printing operation is initiated by depressing a totaltaking transaction key the selecting plate (83) is positioned with i.s surface (87) beneath stud (86) on arm (71) and prevents anti-clockwise movement of the arm when released by cam 76 (Fig. 4, not shown). The latch retainer 65 therefore remains in contact with stud 72 after its initial release by stud 75 on cam 76, Fig. 7, and re-engages link 46 when driven to the left by arm 54, preventing the feed roll from moving into contact with the strip at the end of the second feed and enabling the strip to be withdrawn.