1. A presser foot of a sewing machine comprising:
two presser legs provided on lateral sides of a needle drop position of the sewing machine, and pressing a fabric on a needle plate from above;
a fixed knife attached to one presser leg;
a movable knife held by the other presser leg and reciprocating while slidably coming into contact with an upper portion of the fixed knife; and
a position adjusting unit adjusting an attached position of the fixed knife in a vertical direction,
wherein the presser foot cuts an end of the fabric rising on the needle plate and being led between the two presser legs at a contact position between the movable knife and the fixed knife, and
the position adjusting unit is provided with:
a guide hole passing through the one presser leg in a vertical direction thereof;
a knife holder holding the fixed knife and slidably fitted in the guide hole; and
a stop screw fixing the knife holder at a desired position of the guide hole.
2. The presser foot according to claim 1, wherein the knife holder is a tubular body, and has a flat portion in a peripheral direction thereof,
the stop screw has a flat end portion, and
the knife holder is fixed by pressing the flat end portion of the stop screw against the flat portion of the knife holder.
3. The presser foot according to claim 2, wherein the knife holder has:
a retention groove retaining the fixed knife at a peripheral position which does not overlap the flat portion; and
a thread hole reaching the retention groove, and provided in an axial one end of the knife holder, and
the fixed knife is held by inserting the fixed knife in the retention groove and fastening the stop screw screwed in the thread hole.
4. The presser foot according to claim 1, wherein the stop screw is screwed in a thread hole provided in the one presser leg.
5. The presser foot according to claim 1, wherein the one presser leg has a hole into which the fixed knife is inserted, and the attached position of the fixed knife is adjusted in a range of the hole.
6. The presser foot according to claim 1, wherein the movable knife is pushed to the fixed knife by a spring force.
7. A sewing machine used for feeding two fabrics to a needle drop position on a sewing machine bed while overlapping up and down from respective ends of the fabrics over a predetermined width, and seaming the fabrics, comprising:
a needle plate provided on the sewing machine bed; and
the presser foot as defined in claim 1 for pinching the fabrics with the needle plate.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An electronic component, comprising:
at least one face;
a plurality of microelectronic spring contacts mounted to said at least one face, each of said plurality of microelectronic spring contacts comprising a base mounted to said at least one face, a beam integral with said base and extending along a length thereof from a side of said base away from said at least one face, a free end of said beam opposite to said base, and a contact tip adjacent to said free end of said beam, wherein said beam has an unsupported span between said free end and said base, and wherein each of said microelectronic spring contacts comprises an integral layer of resilient material,
wherein said beam comprises a contoured sheet like shape:
a thickness of said beam decreases from said base to said free end of said beam, and
a width of said beam decreases from said base to said free end of said beam.
2. The electronic component of claim 1, wherein said electronic component further comprises a die cut from a semiconductor wafer, said die comprising an integrated circuit having a plurality of terminals on said at least one face thereof, wherein selected ones of said plurality of microelectronic spring contacts are connected to selected ones of said plurality of terminals.
3. The electronic component of claim 1, wherein said electronic component further comprises a semiconductor wafer, said wafer comprising a plurality of integrated circuits having a plurality of terminals on said at least one face thereof, wherein selected ones of said plurality of microelectronic spring contacts are connected to selected ones of said plurality of terminals.
4. The electronic component of claim 1, wherein said electronic component further comprises an integrated circuit socket, said socket comprising a back surface opposing said at least one face, said back surface having a plurality of terminals, wherein selected ones of said plurality of microelectronic springs are connected to selected ones of said terminals.
5. The electronic component of claim 1, wherein said electronic component further comprises an interposer, said interposer comprising a substrate having a second surface opposing said at least one face; and
a second plurality of microelectronic spring contacts mounted to said second surface, each of said second plurality of microelectronic spring contacts comprising a base mounted to said at least one face, a contoured essentially sheet-like beam integral with said base and extending from a side of said base away from said at least one face, and free end of said beam opposite to said base, wherein said beam has an unsupported span between said tip and said base, and wherein each of said microelectronic spring contacts comprises an integral layer of resilient material;
wherein ones of said second plurality of microelectronic spring contacts are connected to ones of said plurality of microelectronic spring contacts on said at least one face.
6. The electronic component of claim 5, wherein said electronic component further comprises a test head assembly, said assembly comprising:
a fixture, said interposer supported by said fixture; and
a contactor coupled to said interposer.
7. The electronic component of claim 1, wherein said electronic component further comprises a test head assembly, said assembly comprising:
a fixture;
a contactor supported by said fixture, said contactor comprising said at least one face; and
said at least one face of said contactor being placed in contact with at least one of said microelectronic spring contacts.
8. The electronic component of claim 1, wherein said beam, viewed in a direction normal to said substrate surface, is tapered so as to have a generally triangular shape.
9. The electronic component of claim 1, wherein each of said microelectronic spring contacts is formed by depositing the integral layer of resilient material on a sacrificial layer using a method selected from electroplating, electroless plating, sputtering, chemical vapor deposition, or physical vapor deposition.
10. The electronic component of claim 1, wherein said beam, viewed in a direction normal to said substrate surface, has an offset with respect to a central axis.
11. The electronic component of claim 1, wherein said beam, in a lengthwise sectional view, has an arcuate shape.
12. The electronic component of claim 1, wherein said beam, in a lengthwise sectional view, has a corrugated shape.
13. The electronic component of claim 1, wherein said beam, in a lengthwise sectional view, has a stepped portion near the base.
14. The electronic component of claim 1, wherein said beam, in a cross sectional view, is generally V-shaped.
15. The electronic component of claim 1, wherein said beam, in a cross sectional view, is generally U-shaped.
16. An electronic component, comprising:
at least one face;
a plurality of microelectronic spring contacts mounted to said at least one face, each of said plurality of microelectronic spring contacts comprising a base mounted to said at least one face, a contoured beam integral with said base and extending from a side of said base away from said at least one face, and a free end of said beam opposite to said base, wherein said beam has an unsupported span between said free end and said base, and wherein each of said microelectronic spring contacts comprises an integral layer of resilient material, wherein said spring includes a lengthwise rib extending over at least a portion of the beam, and
wherein said lengthwise rib comprises a lengthwise channel that extends into a first surface of the beam and out of a second surface of the beam, the second surface being opposite the first surface.
17. The electronic component of claim 16, wherein said beam, in a lengthwise sectional view, has a stepped portion adjacent the base, and wherein said lengthwise rib extends to said stepped portion.
18. The electronic component of claim 16, wherein said lengthwise rib extends to said base.
19. The electronic component of claim 16, wherein said lengthwise rib extends into said base.
20. The electronic component of claim 16, wherein said lengthwise channel has a regular geometric cross-sectional shape.
21. The electronic component of claim 20, wherein said regular geometric cross-sectional shape is a shape selected from the group consisting of part-rectangular, part-trapezoidal, part-triangular and part-round shapes.
22. The electronic component of claim 16, wherein the cross-sectional dimensions of said lengthwise rib are similar over the length thereof.
23. An electronic component, comprising:
at least one face;
a plurality of microelectronic spring contacts mounted to said at least one face, each of said plurality of microelectronic spring contacts comprising a base mounted to said at least one face, a contoured beam integral with said base and extending from a side of said base away from said at least one face, and a free end of said beam opposite to said base, wherein said beam has an unsupported span between said free end and said base, and wherein each of said microelectronic spring contacts comprises an integral layer of resilient material, wherein said spring includes a lengthwise rib extending over at least a portion of the beam, wherein a cross-sectional dimension of said lengthwise rib differs over the length thereof.