Cutting eye needle

Abstract

Cutting eye needle comprising an elongated portion, a tip portion, and an eye portion comprising a frictionally engaged cutting edge, with adjacent surfaces (14) and (15) intersecting at edge (17) at an angle that creates a frictionally engaged cutting edge, which threads and sews like a conventional hand sewing needle, which is suitable for cutting one or more threads, in professions including the medical field and surgery, and in needlecraft operations particularly suited to quilting, where ends of thread are cut while located inside the cavities of a quilting project, while simultaneously reducing the probability of skin contact of an operator are disclosed.

Claims

1. A cutting edge needle comprising: an elongated portion; a tip portion attached to the elongated portion; and an eye portion attached to the elongated portion, wherein the eye portion comprises a frictionally engageable cutting edge, wherein the frictionally engageable cutting edge (19) is located at the end of the eye portion distal to the tip of the needle, and located outside of the eye of the needle.

2. The cutting edge needle of claim 1, wherein the structure of the needle is monolithic.

Description

DRAWINGS

Figures

(1) FIGS. 1A and 1B show front and side illustrations of a segment of a needle illustrating the eye portion of the needle with its cutting edge in the eye portion of the needle.

(2) FIGS. 2A and 2B show front and side illustrations of a segment of a needle illustrating the eye portion of the needle with a cutting edge in a recessed area on the eye portion of the needle.

(3) TABLE-US-00001 DRAWINGS - REFERENCE NUMERALS 14 surface 15 surface 17 edge 19 edge 25 surface 26 surface

DETAILED DESCRIPTION

FIGS. 1A AND 1B

Preferred Embodiment

(4) A preferred embodiment of a needle of the present invention is illustrated in FIGS. 1A (front view) and 1B (side view). The needle has a conventional elongated portion (not shown), a conventional tip portion (not shown) adjacent the elongated portion, and an eye portion adjacent the elongated portion opposite its tip portion, with adjacent surfaces 14 and 15 intersecting at edge 17 at an angle that creates a cutting edge.

Operation

Preferred Embodiment

(5) Manufacturing of the needle of the present invention involves the process of injection molding which is commonly known to anyone skilled in the field. The needle of the present invention can be manufactured of various types of materials such as metals, ceramics, or plastics common to the injection molding process.

(6) To cut one or more threads using a needle of the present invention, one first pulls on its threaded thread ends to tension the thread. One then slides an eye portion of the needle to a location along the threaded thread, and presses edge 17 against the tensioned thread, cutting the thread.

(7) In difficult-to-reach areas of a sewing project between its two backings, one initially pushes the needle through a first penetration point of the backing into a cavity between the two backings One next pulls the needle through the cavity between the backings. One then pushes the needle's tip and elongated portions into view through a second point in the backing. A distance between the two penetration points of the backing establishes a desired length of what will become a hidden thread end. A configuration of this arrangement leaves the eye portion of the needle remaining inside the backing of the project. One then angles the tip portion of the needle toward the first penetration point of the needle, exposing the threaded thread to edge 17. Next, one tensions the thread and pulls the thread against edge 17 and cuts the thread while inside the cavity. Finally, one pulls the eye portion of the needle through the backing and extracts the remaining, cut thread end through the first penetration point of the needle.

Description

Alternate Embodiments

(8) Referring again to FIGS. 1A and 1B, in an alternate embodiment, edge 17 is a non-deburred edge. In yet another alternate embodiment, surfaces 14 and 15 are non-deburred surfaces.

(9) Still another alternate embodiment of the present invention is illustrated in FIGS. 2A (front view) and 2B (side view). A needle has a conventional elongated portion (not shown), a conventional tip portion (not shown) adjacent the elongated portion, and an eye portion adjacent the elongated portion opposite its tip portion, the eye portion having recessed surfaces 25 and 26 intersecting at recessed edge 19 at an angle that creates a cutting edge at edge 19. In an alternate embodiment, edge 19 is a non-deburred edge. In yet another alternate embodiment, surfaces 25 and 26 are non-deburred surfaces.

Operation

Alternate Embodiments

(10) To cut one or more threads using a needle in its alternate embodiment, one pulls on the ends of the thread to tension it. One then pushes recessed edge 19 against the tensioned thread to cut it. To cut the thread using a needle embodiment comprising non-deburred features, one pushes edge 19 against the tensioned thread, and moves the non-deburred features against the thread in a back-and-forth motion to cause the thread to fray and break, cutting the thread.

Conclusion, Ramification, and Scope

(11) According to the present invention, readers will see that the cutting edge needle of this invention can be used to cut one or more threaded objects using its integrated cutting edge. The needle threads and sews like a conventional hand sewing needle, does not impact conventional hand sewing operations, and will not snag the material being sewn when used during conventional hand sewing. The needle can be used to cut items threaded through its eye portion, and in its alternate embodiment the needle can be used to cut items which are not threaded through its eye portion. The threaded object being cut can be cut to any length. The threaded object can be cut close to the face of the material being sewn, leaving little or no visible thread tail remaining. Items that are cut are cut in a controlled manner. Items that are cut can be cut to any desired length inside difficult-to-reach cavities of a sewing project.

(12) The cutting edges of the needle are designed into the surface of the needle in such a way as to minimize the probability of the operator's skin coming in contact with the cutting edge.

(13) The needle simplifies sewing projects by cutting its own threaded objects, thus occasionally eliminating the need for other cutting tools.

(14) The needle is easily manufactured, and its manufacture adds an insignificant unit cost increase to each needle made.

(15) While the above description contains many specifications, these should not be construed as limitations on the scope of the invention, but as exemplifications of the presently preferred embodiments thereof. Many other ramifications and variations are possible within the teachings of the invention.

(16) For example, the preferred embodiment of the invention places the cutting edge at a focus of the eye portion nearest the tip portion of the needle. The cutting edge could be relocated to one or more different edges along the eye portion of the needle, or the eye portion may be comprised of all cutting edges. Its cutting edge could be at the end of a channel or along a channel within or adjacent its eye portion.

(17) The alternate embodiment of the cutting edge needle places the recessed cutting edge at a surface of the eye portion of the needle opposite the tip portion. Its cutting edge could be relocated to a different part of the surface of the needle.

(18) Its cutting edge shape could have a different form. It could be a V shaped trough, it could be slightly curved, or some other shape.

(19) The scope of the background and advantages of the invention target only quilters. The invention could be used in the medical industry for use in suturing.

(20) Thus the scope of the invention should be determined by the appended claims and their legal equivalents, and not by the examples given.