| 摘要 |
<p>Pistol apparatus for driving in tacks, comprising in combination a magazine adapted to receive at least one set of tacks arranged with their stems parallel and attached to one another indirectly by means of a strip of detachably interconnected cylindrical casings each holding a tack. The pistol comprises a barrel having a bore which has the same internal diameter as the external diameter of the casings, plunger means reciprocable in the barrel, means to apply compressed air to the plunger means to reciprocate the plunger means relative to the barrel to detach a casing and its tack from the set and to cause both to advance through the bore and to detach the tack from the casing and to drive in the stem of the tack into material to be tacked. Means provided on the plunger means retract the empty casing to a position in line with the strip and means are provided to feed the strip into the path of the plunger means whereby the advancing strip pushes the empty casing to a position out of alignment with the barrel. A protuberance provided on the plunger means contact and expel the empty casing of the tack previously driven upon advance of the plunger means to drive the next tack.</p> |
