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US 4,229,111 AGranted
Feed mechanism for marking machine
OwnerRoy A. Schachtinventor
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OwnerRoy A. Schachtinventor
Estimating the term…
A marking machine for marking metal nameplates, tags or the like. The marking machine employs a work table supported on a carriage which is movable into contact with a marking wheel to perform a printing operation. Improved advancing means are provided for the work table utilizing a feed pawl link having a pair of pivot points. One pivot point is connected to a feed link while the second pivot point is connected to a drag link moveable between upper and lower stops in a carriage casting. A bottom pivot point of the drag link is provided with a friction clutch on a pivot connected otherwise to a stationary portion of the machine. An improved feed rack is further provided which is polygonal in cross-section and may have different spaced teeth on each side for selective spacing. Half-spacing adjustment means are provided whereby the feed rack may be moved axially a half-space to change the spacing on the work table. An improved carriage release is furhter provided which comprises a control member pivoted on the same pivot as the pivotable feed link and engageable with the feed link to cause the feed pawl to move both of its teeth out of engagement with the feed rack to provide for manual movement of the work table as desired.
In a marking machine having a vertically moveable carriage supporting a transversely moveable work table supporting a workpiece to be marked by marking characters, said table being transversely moveable with respect to said carriage to advance the workpiece as it is being marked, table advancing means comprising a toothed rack having a series of teeth equi-distantly spaced along a side of the rack and pawl means engageable with said rack for advancing the table the distance between adjacent teeth for each marking operation, the improvement comprising said pawl means including a feed pawl having a pair of teeth engageable with the teeth in said rack, said pawl being pivoted at one end to a feed link member operable to pivot one end of the pawl and pivoted at a second end to a drag member operable to pivot a second end of the feed pawl about a moveable pivot member, limit guide means on said carriage defining upper and lower stops for said pivot member as the carriage is raised and lowered and friction clutch means on said drag member permitting the drag member to move responsive to contact of the limit guide means with the moveable pivot member.
Dependencies are inferred from the claim text.