Abstract: A powerized stapler device is disclosed including an electromagnet, preferably a solenoid, having a armature which is adjustable relative to the solenoid such that the permeable portions of the armature, in the non-energized condition of the solenoid, may be adjusted relative to the solenoid enabling the force exerted by the solenoid to be varied as a function of the initial position of the armature. In a further preferred embodiment, an extension of the armature is engaged with the stapler head whereby movements of the armature relative to the electromagnet also function to vary the space between the stapler head and the stapler anvil, adjustments to process thin work pieces functioning to reduce the spacing between stapler head and anvil as well as reducing the driving force exerted by the electromagnet.

Abstract: A beltless automatic feed chadless envelope slitter device is disclosed. A separator-alignment assembly assures that only the lowermost envelope received from an infeed zone is passed downstream to a slitter and the envelope so-passed has its marginal edge aligned with a guide fence. The separator-alignment assembly is comprised of a pair of drive wheels having upper peripheral portions projecting above the table in combination with a pair of drag levers having high friction portions at the lowermost ends thereof. The high friction portions are preferably spring urged toward the table, and are shiftable upwardly and downwardly to accommodate envelopes of varying thickness and envelopes which themselves include varying thickness portions. The high friction components are urged toward the table at positions laterally offset from the peripheries of the drive wheels.

Abstract: A tabbing machine for applying adhesive tabs over the edge of an article comprises a feed mechanism for advancing tabs from a roll of tape past a tab discharge station. A tab applicator station located downstream of the tab discharge station functions to press the adhesive surfaces of a tab carried by the lead edge of an article to be tabbed which is moved past the applicator station. The device includes a control mechanism having a first photo sensor which senses the presence or absence of an article to be tabbed and a second photo sensor downstream of the first photo sensor for sensing a tab positioned at a tab discharge station. The sensors are interconnected in such manner that the tape drive mechanism for feeding tabs can be energized only when the infeed table is clear of an article to be tabbed and when no tab is located at the discharge station. The position of a tab relative to an article to be tabbed is controllable responsive to adjustment of the second or tab locator sensor.

Abstract: An envelope opener device is provided characterized in that the envelope, which is automatically fed, is slit through only a single face of the envelope whereby no portion of the envelope is severed entirely, thus minimizing the possibility of loss of the contents. A further characterizing feature resides in a unique device for adjusting the cutting depth to achieve a precisely desired cutting effect, the depth adjustment means being actuatable for the slitting of envelopes of thinner stock, such as air mail envelopes. The device is resistant to feeding an envelope which is so disposed that the envelope contents are in registry with the cutting mechanism, thereby minimizing the possability of damaging the contents.