| 主权项 |
1. An apparatus, comprising:
a housing having a first side, a second side, and defining a plenum therein, wherein the first side includes a plurality of apertures therethrough, wherein the plurality of apertures are in communication with the plenum, wherein the second side includes a port configured to be connectable to a vacuum source; and a plurality of vacuum pins arranged in respective ones of the plurality of apertures, wherein the plurality of apertures include a proximal opening and a distal opening that have dimensions matching dimensions of an exterior surface of the vacuum pins, wherein an interior of the apertures between the proximal opening and the distal opening have dimensions that are larger than the dimensions of the proximal and distal openings, wherein each of the plurality of vacuum pins includes a base portion engaging an aperture and a tip end extending away from an outward-facing surface of the first side, wherein the vacuum pins include passages therethrough from the tip end to the base portion, wherein the vacuum pins are moveable between a first position and a second position relative to the apertures, wherein the tip ends extend away from the outward-facing surface of the first side by a greater amount in the first position than the second position, wherein the vacuum pins include a first ridge extending away from the exterior surface at a location between the proximal and distal openings of the aperture, wherein the vacuum pins include a second ridge extending away from the exterior surface at a location in the plenum such that the proximal opening is between the first ridge and the second ridge, and wherein the first ridge and the second ridge cannot pass through the proximal opening or the distal opening, and wherein the first ridge is discontinuous around a perimeter of the exterior surface of the vacuum pin. |
