Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B15/00—Nails; Staples
  • F16B15/08—Nails; Staples formed in integral series but easily separable
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B15/00—Nails; Staples
  • F16B15/02—Nails; Staples with specially-shaped heads, e.g. with enlarged surfaces

Definitions

• the present invention relates to a strip of inter ⁇ connected, substantially T-shaped fasteners, each of which includes a central pin-like section which is intended to be driven into a sub-structure, and a gripping section which is arranged at one end of the pin- like section at right angles thereto, and which is intended to press against an object and hold the same firmly to said sub-structure.
• the invention also relates to a fastener forming such a strip.
• fastener it has long been known to fasten paper, plastics, cloth, leather and equivalent materials to different sub-structures or support surfaces, with the aid of some kind of fastener.
• the fastener most used comprises steel- wire bent into a U-shape.
• fasteners are normally joined side by side, to form a rigid, coherent strip which can be inserted into a stapling machine which has means for automatically advancing and driving individual fasteners successively into the said sub-structure or support surface.
• the aforedescribed U-shaped steel-wire fastener has been found unsatisfactory in a number of respects. This applies, for example, in those instances when the fastener is exposed to a corrosive environment, for example when u. e ed outdoors. Such fasteners can also be troublesome when the object into which they are driven is to be scanned by magnetic or optical detectors, as may be the case, for example, in wood handling processes. The presence of a steel-wire fastener in wood which is to be cut, is also liable to blunt the edge of the cutter, should it come into contact therewith.
• the fastener can be surface coated with a non-corrosive substance - resulting in greater or lesser success.
• the disturbances which occur in operation when automatically scanning wood in which such fasteners are present, cannot be eliminated in this way, however. Neither can damage to the cutters be avoided.
• steel-wire fasteners Another disadvantage with steel-wire fasteners is that they cannot be used satisfactorily to secure, for example, telephone wires or electric cables, to sub ⁇ structures, since the fasteners are liable to cause short-circuits or to create troublesome cross-lines.
• a primary object of the invention is to provide a fastener which can be used just as readily as conventional U-shaped steel-wire fasteners, i.e. staples, but by means of which the aforementioned disadvantages are eliminated.
• This object is achieved in accordance with the invention by means of a plastics fastener which can be produced in the form of a rigid strip and which is so formed as to enable it to be driven into a sub-structure with the same ease as a conventional wire staple.
• the strip In order to be able to advance the strip by means of a feed spring, the strip must be absolutely rigid, i.e. the fasteners must be immovable relative to one another in all planes. Fasteners produced in the form of strips which can be rolled-u do not fulfil this requirement.
• Fastener strips according to the invention can also be manufactured in a simple fashion at low costs.
• a strip of mutually interconnected fasteners of the kind described in the introduction is characterized in that the strip is manufactured as a single, integral structure from a plastics material, with the mutually interconnected T-shaped fasteners located parallel with one another, to form a strip of T-shaped cross-section; and in that the fasteners in said strip are mutually connected together by means of spacers which join both the pin ⁇ like sections and the holding sections of mutually adjacent fasteners together, to form a rigid strip which can be inserted into a fastener-driving device having automatic feed means, so as to enable individual fasteners to be driven successively into the sub ⁇ structure, while shearing off said spacers.
• mutually adjacent fasteners in the strip are joined together by means of three spacers, of which one connects together the pin-like sections of said fasteners, while the other two connect together the gripping sections of the fasteners, on a respective side of the pin-like sections.
• a strip constructed in this fashion will be extremely rigid, and can be used in ⁇ conjunction with fastener-driving devices which operate in a conventional manner.
• fasteners which a rt-ade of a plastics material have, with time, the tendency of easing themselves out of the sub-structure, because, inter alia, they do not corrode and hence are not held by rust, as in the case of wire staples.
• This problem is solved by means of the invention, in that the spacer which joins together the pin-like sections of mutually adjacent fasteners is so arranged that when sheared off, it forms an anchoring projection which co-acts with the sub-structure to hold said fastener firm. This represents a very important feature of a fastener according to the present invention.
• Figure 1 is a perspective view of a strip of mutually joined fasteners.
• Figure 2 illustrates a fastener incorporated in the strip illustrated in Figure 1.
• Figure 3 illustrates the use of the fastener shown in Figure 2, in fastening a lable to a sub-structure.
• Figure 4 illustrates a modified fastener according to the invention when used for securing a pair of electric cables to a support surface or sub-structure.
• each of the fasteners in the strip illustrated in Figure 1 comprises a pin-like section 1 having a chamfered end which terminates in a point 2, thereby to facilitate entry of said section into said support surface or sub-structure, and a gripping section 3 located at right angles to the pin-like section at the end thereof remote from the point 2.
• a gripping section 3 located at right angles to the pin-like section at the end thereof remote from the point 2.
• tooth-like projections Arranged on the gripping section 3 adjacent the outer extremities thereof are tooth-like projections which when a fastener is driven into the sub-structure, co-act -with the object to hold it against said sub-structure.
• Mutually adjacent fasteners are connected together by means of three spacers 5 and 6 respectively, of which spacers the spacers 5 connect together the gripping sections 3 of mutually adjacent fasteners, on respective sides of the pin-like sections 1 , while the spacers 6 connect said mutually adjacent pin-like sections at locations adjacent the points 2 thereof.
• the spacers hold all fasteners together in a manner to form a T-shaped strip which is totally rigid in all planes. This means that the strip of fasteners just described can be loaded into conventional fastener-driving
• O PI devices for example manually operated staplers or automatic stapling guns.
• the only modification which need be carried out on said conventional devices is one in which the two outer channels which accommodate or guide the two legs of a conventional staple-type fastener are replaced, or supplemented, with a central channel for accommodating or guiding the pin-like section 1 of a fastener according to the invention. Because the strip is completely rigid, it can be advanced by means of a thrust spring, so that successive fasteners are located in a driving position, from where they can be driven into said support surface, while shearing off the spacers 5 and 6.
• the strip of fasteners illustrated in Figure 1 can readily be produced by injection moulding techniques, from a thermoplastics material, such as acetal or polyamides.
• the spacers 5 and 6 may be corresponded by die channels arranged to transfer plastics material between the fastener-producing mould cavities.
• Figure 2 illustrates an individual fastener taken from the strip shown in Figure 1
• Figure 3 illustrates a like fastener driven into a sub-structure 7, to secure a lable 8 thereto.
• the lable 8 is pressed firmly against the support surface or sub-structure through the agency of, inter alia, the tooth-like
• Figure 4 illustrates a fastener according to the invention in which the under surfaces of the gripping section 3 are concave and in which the tooth-like projections on said gripping section have been replaced with downwardly projecting end portions 9.
• the fastener of the Figure 4 embodiment is used to anchor a pair of electric cables 10 to a sub-structure, the fastener being pressed down through the cable insulation, between the two conducting cores 11. These fasteners are also provided with anchoring projections 6.
• Fasteners of this kind enable electric cables, for example telephone cables, to be secured in a highly rationalized fashion, since it is possible to use manually operated or automatic stapling guns for driving the plastic fasteners into said sub- structure, without risk of short circuiting the conductors.
• fastener Two embodiments of a fastener according to the invention have been described in the aforegoing.
• the fastener is not restricted to these embodiments, however, but can be modified in shape and form within the scope of the following claims.
• the number of spacers used and their positioning may be different to that shown, although it is important that both the pin ⁇ like sections and the gripping sections are mutually connected together in the strip.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Clamps And Clips (AREA)
• Slide Fasteners (AREA)
• Connection Of Plates (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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• 1982
  • 1982-11-15 SE SE8206484A patent/SE8206484D0/sv unknown
• 1983
  • 1983-10-19 SE SE8305752A patent/SE440687B/sv not_active IP Right Cessation
  • 1983-11-11 WO PCT/SE1983/000395 patent/WO1984001985A1/en active IP Right Grant
  • 1983-11-11 EP EP19830903621 patent/EP0141817A1/en not_active Withdrawn
• 1984
  • 1984-12-10 FI FI844873A patent/FI76190C/sv not_active IP Right Cessation

Non-Patent Citations (1)

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