32 of the roller support structure 20. In FIG. 1, extension apparatus 50 adjacent the first ends 26 of the first and second frame members 22 and 24 and adjacent the second end 28 of 20 the first frame member 22 are in retracted positions. The extension apparatus 50 at the second end 28 of the second frame member 24 is in an extended position. Referring to the illustrative extension apparatus  50 in the enlarged view of FIG. 2, a coupling element 52 reciprocably depends from, 25 and is adapted for extension beyond the first end 26 of,  the first elongated frame member 22. The coupling element 52 includes a coupling plate 54 oriented along  a  plane that extends perpendicularly to the roller-axis plane Pg and the longitudinal axis Ag of the roller support structure 20. The 30 coupling plate 54 rigidly depends from an adjustment mem-

ber 56. In the particular illustrative embodiment of FIG. 2, the adjustment member 56 comprises a plate 57 having a dimension that extends in a direction parallel to the   longi-

tudinal axis Ag of the support structure 20. The adjustment 35 member 56 includes an elongated slot 58 through which the male member 60 of a male-female  fastener pair  62 (e.g., a bolt and nut) extends for coupling with the female  member

64 of the fastener pair 62. The elongated slot 58 is oriented such that, when the fastener pair 62 is loosened, the coupling 40 element 52 can  be  longitudinally  reciprocated  between a fully retracted position and positions in which the overall length of the support structure 20 is extended. For the embodiment of FIG. 2, the latter positions correspond to positions in which the coupling plate 54 extends beyond the 45 first end 26 of the first elongated frame member 22. Once the desired position for the extension member  56 is   achieved,

the adjustment member 56 is fixed in position with respect to the support structure 20 by tightening the fastener pair 62

until  another position  is desired. 50

The coupling plate 54 is adapted for coupling to a unit of equipment adjacent the conveyor module 15 from which the coupling plate 54 depends. Referring still to the illustrative version of FIG. 2, the coupling plate 54 includes at least one aperture 68 adapted for receipt of a coupling fastener (e.g.,   55 a bolt, not shown) depending from an adjacent unit of equipment to which the conveyor module 15 is to be selectively coupled. Although numerous alternative configu- rations for extension apparatus 50 and coupling elements 52 within the scope and contemplation  of  the  invention will 60

readily occur to those of ordinary skill in the art and, furthermore, while the particular configuration of the cou- pling element 52 is secondary to functionality (i.e., the capacity to be extended and coupled to an adjacent  object),

a few illustrative alternative suggestions are described.  The 65

following alternatives represent a limited set of alternative configurations intended to suggest alternative apparatus for embodying and practicing the invention. Accordingly, the following alternative configurations are illustrative only and in no way intended as a limitation on the scope of the invention as expressed in the  claims.

In one alternative version, an elongated slot is included in the elongated frame member rather than, or in addition to, the adjustment member 56. In other versions, a threaded male fastener member 60 fixedly depends from one of the adjustment member 56 and the support structure 20 and the other of the adjustment member 56 and support structure 20 includes a slot 58 for receiving the male fastener member 60. In another version, one of the support structure 20 and the adjustment member 56 includes a threaded bore constituting a female fastener member 64 adapted for receiving a male fastener member 60 that passes through a bore in, or otherwise depends from, the other of the support structure 20 and adjustment member 56. In still another version, a ratchet system (not shown) is employed for alternative incremental extension and retraction of the coupling element 52 with respect to the support structure 20. In a version including a ratchet system, one of the support structure 20 and the adjustment member 56 includes a toothed or notched surface including troughs selectively and interdentably engageable by a pawl pivotably or slidably depending from the other of the support structure 20 and adjustment member  56.