We claim the ornamental design for a docking device for card reader, as shown and described.
FIG. 1 is a perspective view of one embodiment of a docking device for card reader, showing my new design;
FIG. 2 is a partially exploded, perspective view thereof;
FIG. 3 is a front-left perspective view thereof;
FIG. 4 is a front-right perspective view thereof;
FIG. 5 is a rear-left perspective view thereof;
FIG. 6 is a rear-right perspective view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a front elevational view thereof;
FIG. 9 is a rear elevational view thereof;
FIG. 10 is a right side elevational view thereof;
FIG. 11 is a left side elevational view thereof; and,
FIG. 12 is a bottom plan view thereof.
Broken lines are for illustrating unclaimed portions of the docking device for card reader and for illustrating an environment related to the claimed design; the broken lines form no part of the claimed design.