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99

RIBBON FEED

drawing of ribbon

FOREWORD

A majority of Ribbon Feed and Reverse Troubles are caused by improper installation of Ribbon Spools or improper direction of the ribbon. Before attempting Ribbon Feed Adjustments, the following contributing causes should be checked:

a. Proper Spool not used. Use manufacturer's spool for each make of machine. An Underwood Spool will not work on a Royal, or vice versa, etc.

b. An Underwood Ribbon will not work on any other machine unless the eyelets on either end of the ribbon are first removed.

c. A Remington, Royal, Smith or Woodstock Ribbon will not work on an Underwood Typewriter unless a reverse eyelet is inserted at a point at least four inches from each end of the ribbon.

d. Ribbon must be fed properly through the Ribbon Guide and must be directioned properly off the Ribbon Spool (from the front-not the rear of spool). See drawing above.

e. Ribbon Spool Shafts must be free-not sluggish nor binding.

f. Ribbon Spool must be properly installed on Spool Shaft.

g. Typebar covers must clear ribbon spool.


100

REMINGTON
1. The Spring Drum of the Remington #17 provides the motive power to the ribbon feed mechanism when the carriage moves to the left while typing or spacing (not while tabulating or when carriage is moved by depressing Carriage Release Lever). The gear on the Spring Drum meshes into the Spring Drum Pinion turning the Spring Drum Pinion Shaft and the Ribbon Driving Gear Pinion which meshes with the Ribbon Drive Gear. The Ribbon Drive Gear Stud, fitting into the Drive Shaft Arm (see lower drawing) rotates the Ribbon Drive Shaft Rod. When carriage is moved to the right the Ribbon Throw-out Screw acts on the Pinion Release Bell Crank mechanism (see Tabulator) so that the Pinion Release Bell Crank Link will throw Spring Drum Pinion out of mesh with the Spring Drum gear. The Ribbon Drive Shaft Rod is fitted with a Ribbon Reverse Cam (left and right). The function of these cams is to move the Ribbon Drive Shaft Rod to the left or right when the cam is engaged by a Ribbon Reverse Plunger which moves down, ward into engaging position by the action of the Ribbon Reverse Tripping Lever at the time the ribbon completely unwinds from that spool.
The Ribbon Reverse Detent Plate mechanism controls and limits the movement (from side to side) of the Ribbon Drive Shaft Rod and should be adjusted to cause proper mesh of the Left and Right Ribbon Driving Gears.

2. ADJUSTMENTS. Before attempting Ribbon Feed Adjustment, check common causes of Ribbon Feed Trouble, Foreword sheet of this section.

a. Ribbon Feed:

(1) Determine if Spring Drum Pinion is meshing properly in Spring Drum Gear. If the Spring Drum Pinion Support adjusting screw is preventing proper meshing of gears, adjustment can be made with Spring Drum Pinion Support Adjusting Screw.
(2) Determine if Pinion Release Bell Crank Link is holding Spring Drum Pinion Support from proper contact with Support Adjusting Screw. Adjustment is made with Pinion Release Bellcrank Eccentric.

(3) Check Spring Drum Pinion binding screws for tightness and Spring Drum Pinion for proper engaging position. Adjust with Spring Drum Pinion binding screws.

(4) Check Ribbon Driving Gear Pinion Binding Screws for tightness. Check Driving Gear Pinion for proper position and Pinion Shaft Support for proper positioning of Ribbon Driving Gear Pinion in mesh with Ribbon Drive Gear. Adjustment can be made with Spring Drum Pinion Shaft Support screws.

(5) Check Ribbon Spool Shaft Pinion for proper mesh with Ribbon Driving Gear. Check Screws for tightness.

(6) Ribbon Spool Shafts, right and left, are not interchangeable. If incorrectly installed, ribbon feed trouble will result. Clearance of .008" should be maintained between top of Ribbon Spool Shaft Space Collar


and bottom of Spool Shaft Bracket, point indicated in drawing. To adjust, loosen both left and right hand ribbon spool shaft tension spring collar set screws. Loosen left and right hand ribbon spool shaft pinion set screws. With an .008" gauge set between the top of R. H. Ribbon Spool Shaft Space collar and bottom of R. H. Spool Shaft Bracket, push down on R. H. Ribbon Spool Shaft as you raise Ribbon Spool Shaft Pinion; tighten Pinion Set Screws. Repeat on L. H. Ribbon Spool Shaft. Tension adjustment for Ribbon Spool Shaft is provided by Ribbon Spool Shaft Tension Spring collar. Sufficient tension should be provided to support the weight of the full ribbon spool and winding disc without any noticeable sag. After adjusting, tighten Spool Shaft Tension Spring Collar set screws.
(7) Check the Ribbon Drive Gear Stud position in Drive Shaft Arm (see lower drawing). When replacing unit into typewriter frame, care should be taken that Ribbon Drive Gear Stud positions properly in the Drive Shaft Arm.

b. Ribbon Reverse:

(1) As the Ribbon unwinds completely from a spool the Ribbon Reverse Tripping Lever on that Spool Shaft rises and the Ribbon Reverse Plunger drops down in position to contact the Ribbon Reverse Cam on the Ribbon Drive Shaft Rod. The Cam form of the L. H. and R. H. Ribbon Reverse Cam must face each other on the Ribbon Drive Shaft Rod with high point up on one side, down on other. Rotation action of the Ribbon Drive Shaft Rod with the Plunger in position on the Cam causes the movement of the Rod to the opposite, direction and if the Ribbon Driving Gears have been set properly as outlined in Paragraph a (4) above, they will mesh properly. In this action the Detent toggle of the Ribbon Reverse Detent will reverse its position (if forward it will move back and if back it will move forward).
(2) Ribbon Reverse Detent should be positioned properly for holding Ribbon Drive Shaft Rod in proper position. To adjust, loosen Plate Set Screws and R. H. Ribbon Driving Gear Set Screw. Set Detent Toggle as shown in lower drawing with detent stud engaged in R. H. Ribbon driving gear slot. Move Ribbon Reverse Detent Plate until R. H. Ribbon Driving Gear meshes correctly with R. H. Ribbon Spool Shaft Pinion. Check Ribbon Spool Shaft Pinion to see that it meshes all around with the R. H. Ribbon Driving Gear with proper fitting and minimum amount of play. Tighten plate set screws, being careful that stud in slot of Roll is not binding. Tighten R. H. Ribbon Driving Gear Set Screw after sliding Ribbon Drive Shaft Rod to the extreme right. Set Detent toggle to the front as shown in upper drawing. Raise Ribbon Drive Shaft Shift Lever and set Left Ribbon Driving Gear in correct mesh with L. H. Ribbon Spool Shaft Pinion, then tighten L. H. Ribbon Spool Pinion Set Screw.


101

Reminton ribbon feed


102

ROYAL
The Ribbon Feed motivating power is transmitted by the Spring Drum Gear to the ribbon feed mechanism of the Royal Typewriter by means of a Worm Shaft whenever the carriage moves to the left, either in typing, tabulating, space bar depression or when moved by hand with the carriage release lever depressed. The Worm Shaft Pinion Assembly consists of a large and a small pinion, firmly affixed, having free bearing on the Worm Shaft connecting rod. The large pinion is enmeshed with the Spring Drum Gear while the small pinion seats the pinion case pawl. When the carriage moves to the left, the pinion pawl forces the pinion case and the Worm Shaft, to which it is affixed, to turn. When the carriage moves to the right, the small pinion releases the pinion case pawl, allowing the pinion assembly only to move freely. The Worm Gear, on the front end of the Worm Shaft, is enmeshed either with the Left Ribbon Spool Shaft Spur Gear as in the top drawing, left hand spool assembly, winding ribbon onto the left hand spool, or with the Idler Gear as in the lower drawing, left hand spool assembly, winding ribbon onto the right hand spool. In normal operating (non-reversing) position, both Automatic Reverse Arms are positioned against their stops on Ribbon Spool Bracket, and the Automatic Reverse Rolls (right and left) are both clear of the Reverse Cam.
As the ribbon unwinds from the right hand spool, as in the top illustration, the Automatic Ribbon Spool Trip, which is assembled into the Ribbon Spool, falls out of position in spool hub and the lower arm of the Trip engages the Automatic Reverse Arm pushing it back (towards rear of machine). The Automatic Reverse Shaft, which is attached to the right hand Automatic Reverse Arm Lever, pivots with the Lever in this operation, moving the left hand lever in same direction, which moves the top Automatic Reverse Roll (right) into engaging position with the Reverse Cam. As the Worm Shaft is constantly turning, the formed end of the cam comes into contact with the top Automatic Reverse Roll (right), which moves the Ribbon Reverse Arm, in which the Worm Shaft is positioned, down out of engagement with the Left Hand Ribbon Shaft Spur Gear into mesh with the Idler Gear, thereby reversing the gear action and causing the ribbon to feed on the Right Hand Spool, freeing the left hand spool.

As the ribbon unwinds from the left spool, as in the lower illustration, the Automatic Ribbon Spool Trip contacts the Automatic Reverse Arm (which governs the position of the lower Automatic Reverse Roll (left). As the Reverse Arm moves back toward the rear of machine the Automatic Reverse Roll (left) moves into position below the Reverse Cam. This contacts the Reverse Roll and raises the Worm Gear and the automatic reverse arm to which it is attached up to enmesh the Worm Gear with the Ribbon spool gear, causing the ribbon to feed on the left hand ribbon spool and freeing the right hand ribbon spool.

As one spool (right or left) is always engaged in gear mesh in one direction both spools may be freed from manual winding on either spool by holding the Ribbon Reverse Handle in neutral position by moving Ribbon Feed Release Handle to the