Browse Prior Art Database

Trolley/Rail Mechanism for Printers

IP.com Disclosure Number: IPCOM000045492D
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Kacmarcik, DJ: AUTHOR [+5]

Abstract

Low friction traversing carriers for printers typically have the disadvantage of relatively high cost. If the cost of the carrier is low, then the user is confronted with inadequate or poor designs exhibiting position variations or misregistration due to clearance for free movement. Provided is a low cost carrier-trolley design which provides for low friction movement, compensates for dimensional variation of the all within the limits of the axial freedom of the rollers, and permits of zero clearance for positional accuracy while allowing for quiet operation.

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Trolley/Rail Mechanism for Printers

Low friction traversing carriers for printers typically have the disadvantage of relatively high cost. If the cost of the carrier is low, then the user is confronted with inadequate or poor designs exhibiting position variations or misregistration due to clearance for free movement. Provided is a low cost carrier-trolley design which provides for low friction movement, compensates for dimensional variation of the all within the limits of the axial freedom of the rollers, and permits of zero clearance for positional accuracy while allowing for quiet operation.

Referring now to the drawing, a traversing trolley 20 is contained within a rail system 10 utilizing five rollers 21-25 which are permitted to move axially of their own axles 21A-25A within the trolley. The linear rail 10 is formed of a pair of lazy-J extrusions 11 and 12 having smoothly curved and longitudinally extending corner portions, such as the corners 13 and 14 illustrated in Fig. 2. The rollers 21-25 self-adjust axially (i.e., along their own axles 21A-25A) to compensate for dimensional variations, the rollers being placed within apertures in the body of the trolley, opposite rollers being canted in the opposite direction. The rollers 21- 25 are fixedly journaled in the trolley 20 and are particularly adapted for use in a system where a weight will be placed perpendicular to the longitudinal axis of the trolley 20. In this configuration, the five constrained wheels or rollers serve to restrict the degrees of freedom of the trolley such that the only remaining degree of freedom is the desired translation along the linear...