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Title: Staple fastening tool
Claims: What is claimed is: 1. An applicator apparatus for securing hinge fasteners having alternating ribs to the end of a belt by staples, said applicator apparatus comprising an anvil means having an anvil surface for deflecting lower free ends of the staples to clinch the staples to the underside of the belt fasteners, a staple guide block means mounted over said anvil means with a portion thereof spaced from said anvil surface to admit a belt end therebetween, means mounting said staple guide block means for relative movement with respect to said anvil means between an open position admitting the belt end and a closed position for holding the belt for staple application, means for shifting said staple guide block means, means in said guide block defining vertically extending open shafts for receiving staples to be driven through said belt fasteners and the belt end, means for aligning the belt fasteners relative to said staple guide block means and to said anvil surfaces and including alternating slots to matingly receive alternating ribs in the hinge fastener, depending means on the outer edge of said guide block means for abutting the free ends of said belt fastener legs to hold said ribs of said fasteners in said slots during a stapling operation, and a resilient clamping means associated with said staple guide block means and said anvil means and engaging the belt end and applying a holding force thereto to resist shifting of the belt end during driving of the staples through the belt and the clinching of the staple ends. 2. An applicator apparatus in accordance with claim 1 in which said resilient clamping means comprises at least one resiliently biased pin located on an outer lip portion of said guide block and carried downwardly thereby against the belt end. 3. An applicator apparatus in accordance with claim 1 in which said depending means includes an outer depending lip for abutting the free ends of the belt fastener legs and in which an inclined surface on said guide block means abuts the inclined upper legs of the belt fasteners. 4. An applicator apparatus in accordance with claim 1 in which said means for shifting said staple guide means relative to said anvil means comprises a lock pin having a lower end threaded into said anvil means to allow turning adjustment of the lock pin, a cam lever pivotally attached to the upper end of the lock pin, and shoulder means on said guide block for abutting said cam lever and preventing inadvertent rotation thereof and the attached locking pin to adjust the same. 5. An apparatus in accordance with claim 1 in which said staple guide block means comprises a molded plastic body and in which said anvil means comprises a metal plate. 6. An apparatus for the attachment of hinge fasteners to the ends of flexible belts by the insertion of staples through holes provided in said fasteners and through the belt thickness, comprising an anvil means having an impact surface including an impact portion and an orienting portion, an elongated lock pin having an attached end and an extended end, said attached end being attached to and projecting upwardly from said orienting portion of said anvil surface, a cam lever pivotally attached to said extended end of said lock pin, guide block means slidably mounted upon said lock pin between said anvil means and said cam lever whereby said guide means is movable between open and closed positions relative to said anvil means, said cam lever being positioned and shaped to selectively urge said guide block toward said anvil surface, said guide block means including a positioning portion having an exposed surface and an oppositely disposed inner surface and defining a plurality of receiving shafts therethrough between said exposed and inner surfaces, means orienting said guide block with respect to said anvil means with said inner surface of said guide block facing said impact portion of said anvil surface to co-operatively define a channel therebetween that is adapted to withdrawably receive a fastener and belt therein when said guide block is in an open position and means aligning said fasteners and holding the same against rearward movement and for retaining said fastener and belt in an aligned position with respect to said staple shafts when said guide block is in a closed position, driver means slidably and withdrawably received within said staple shafts, a retainer lip depending from said positioning portion of said guide block into said channel and toward said anvil surface to engage and hold the belt fastener against forward movement, pin means mounted in said retainer lip and depending beyond said retainer lip into said channel, and means resiliently biasing said pin toward a belt disposed in said channel to engage said belt and restrain the same against movement out of said channel when said guide block is in its closed position. 7. The device described in claim 6 wherein said inner surface of said guide block means is oriented in a plane that is inclined with respect to the plane of said anvil surface, said co-operatively defined channel therebetween having a generally U-shaped crosssection in which the legs of the U-shape diverge in the direction of the open end of the U-shape. 8. The device described in claim 6 wherein said attached end of said lock pin is threadably received in said anvil to allow adjustment of the length of that portion of said pin that extends from said anvil. 9. The device described in claim 8 and including lug means provided integral with said first surface of said guide block adjacent said cam lever to inhibit rotation of said lock pin from a preselected position. 10. An applicator apparatus movable along a belt end to secure a row of aligned hinge belt fasteners to the belt end with staples, said applicator apparatus comprising an anvil means having a surface for deflecting the lower free ends of the staples to clinch the staples to the undersides of the belt fasteners, a staple guide block means mounted over said anvil means with a portion spaced from said anvil surface to admit a belt end and a plurality of belt fasteners, means mounting said staple guide block means for relative movement with respect to said anvil means between an open position admitting the belt end and a closed position for holding the belt for staple application, means in said guide block means defining openings for receiving staples and for guiding the staples into openings in the belt fasteners, means for holding belt fasteners against rearward movement and against forward movement and against lateral movement during staple application, and at least two separated resilient clamping means associated with said guide block means and said anvil means and engaging said belt at two locations and holding said belt to resist shifting of said belt or said applicator apparatus as would misalign hinge pin receiving openings in said hinge belt fasteners. 11. An apparatus in accordance with claim 10 in which at least two separate guide block means and anvil means are disposed side-by-side and in which one of said resilient clamping means for said belt is carried by each of said guide block means. 12. An apparatus in accordance with claim 11 in which said means for holding said belt fasteners against forward movement comprises a depending means on each of said guide block means to abut the free forward edge of the upper leg of a hinge belt fastener. Other info: Inventors: Pray, Winston C. (Lombard, IL, US) Application Number: 765788 Filing Date: 1977-02-04 Publication_date: 1978-09-05 Assignee: Flexible Steel Lacing Company (Downers Grove, IL) Primary Class(es): 29/243.51 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Jones, Jr., James L. Assistant Examiner: Attorney: Fitch, Even, Tabin & Luedeka |
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