US2926702A - Loop pile cutter - Google Patents

Description

March 1, 1960 H. w. PENMAN ,702

LOOP FILE CUTTER Filed Sept. 2:, 1958 2 Sheets-Sheet .1

HURL W.

' INVENTOR P E N M A N ATTORNEY March 1, 1960 H. W. PENMAN LOOP PILE CUTTER 2 Sheets-Sheet 2 Filed Sept. 25, 1958 INVENTOR HURL W. PENMAN ATTORNEY United States Patent 2,926,702 LOOP PILE CU'ITER Hurl W. Penman, Bloomsburg, Pa., assignor to The Magee Carpet Company, Bloomsburg, Pa., a corporation of Pennsylvania Application September 23, 1958, Serial No; 762,757

13'Claims. (Cl. 139-46) ting blades 24 which are semi-circular in shape.

ing a series of oscillating cutting blades associated with u the gauges of a loom operable to move into cutting engagement with the loops formed on the. gauges as the loops move along the gauges in a direction opposite to the movement of the cutters.

A still further object of the invention resides in pro viding gauges having grooved loop forming portions with oscillating cutters operable in the grooves to cut the loops formed thereon. Another object of the invention residesin providing a cutting mechanism having an oscillating shaft extending transversely of the loom above the forward ends of the gauges having a series of removable cutting blades for co-action with the gauges to cut the loops formed there Other objects and advantages of the invention will be apparent during the course of the following cation.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Fig. l is an end elevational view of the cutting mechanism applied to a gauge loom partly in section,

Fig. 2 is a fragmentary top plan view of the cutter shaft and one of the end bearings,

Fig. 3 is a cross sectional view of the cutter shaft and fragmentary longitudinal section of the loom gauge,

Fig. 4 is a detail fragmentary view of the cutter shaft with the blades removed, u

Fig. 5 is a fragmentary elevational view of the cutter shaft showing the clamping plates for holding the blades, Fig. 6 is a sectional. view taken on line 6-6 of Fig. 5, it Fig. 7 is a diagrammaticvievv of the drive mechanism for the cutter shaft, and, u

Figs. 8, 9 and 10 are views of the intermediate bearingsforthecutter shaft. a

In the drawings wherein for the purpose of illustration a preferred embodiment of the invention is shown the numeral 5 denotes generally the pile forming mechanism of a gauge loom such as disclosed in the application of Orrin J. Park et 211., Serial No. 572,657, new U.S. Patent No. 2,896,671. In this type of loom a slide bar 6 mounted in slide rails 7 reciprocates transversely of the 100m and supports an oscillating shaft 8 carrying a frame 9 on which are mounted a series of arms 10 having apertures 11 at their free ends to receive the pile yarns 12. As the shaft 8 oscillates the arms 10 carry the yarns 12 into and out-of the ground warps 13, the yarns being tied into the ground warps by weft shots in the usual manner. The arms 10 swing downwardly and upwardly on one side of the fixed gauges 14 and then downwardly and upwardly on the opposite side of the gauges tensions.

2,926,702 Patented Mar 1 960 thus carrying the pile yarns across the top edge of the gauges forward of the shoulder 15 to form pile loops 16 on the reduced forward portion 17 of the gauges. Attached to the free end of the portion 17 is a U-shaped extension 18 the upper edge of which is inclined downwardly in a forward direction, as at 19. V

A cutter shaft 20 extends transversely of the loom above the extensions 18 of the gauges being mounted in endbearings 21 attached to a cross bar 22 supported by standards 23. The cutter shaft mounts a series of cut- The blades are removably mounted in slots 25 formed in shaft 20 so that the curvedcutting edge 26 projects be yond the periphery of the shaft and enters the groove in the extension 18. Upon oscillation of shaft 20 the cutting blades swing back and forth to cut the pile loops as they move forward along the gauges. A series of apertures '27 extend transversely of the shaft 2%) in communication with the slots 25 to. receive the stems 28 projecting from the straight edge of the blades 24. The stems extend from the blades slightly olf center so one end of the blade projects a greater distance from the periphery of the shaft than the other end. The free ends of the stems are notched to receive the clamping plates 29 seated in the rabbet 30 formed in the shaft and are removably held in clamping position by screws 31.

The end bearings 21 are mounted on cross bar 22 by brackets32 including a cross member 33 having transverse openings to receive fastening screws 34. An adjusting screw 35 extends vertically through the cross member 33 in bearing engagement with a plate 36 below the cross member to permit limited vertical adjust,

ment of the bearings. A series of intermediate bearings are provided between the end bearings which include a cross member 37 secured to the cross bar .22 in the same manner as the end bearings. The cross member 37 is formed with a projecting hanger 38 which is slotted, at 39, to form a series of spaced bearings 40 which are relatively thin. so as to fit between the cutter blades on the shaft 20.

Any suitable mechanism may be provided for oscil lating shaft 20, such as shown in Fig. 7, wherein the shaft is provided at both ends with crank arms 41 connected by a connecting rod 42 with a reduced crank arm 43 mounted on the ends of a drive shaft 44 which is driven by a motor or other suitable driving means.

In operation, the pile loops,16 are formed over the forward portion 17 of the gauges 14 by the to and fro movement of the yarn carrying arms 10 and as the fabric being woven moves forwardly the loops slide forwardly over the extension 18 of the gauges. As the loops move forwardly the. shaft 20 is oscillating to swing the cutting blades 24 and the oscillation of shaft 20 is so timed that when theloops move onto the extensions 18 of the gauges the cutters are swung in a direction opposite to the movement of the loops and upon entering the grooves offlthe extensions sever the loops on thc ex,- When a blades swing in the opposite direction the uncut loops on the gauges move forward onto the extensions to be cut during the next cycle of operation of the blades. Thus, it is seen that when the blades swing in a cutting direction a series of loops on the gauges are severed and while the blades are swinging in a non-cutting direction the next series of loops to be cut are advanced along the gauges over the extensions at their ends. Since the extension which supports the loops is U-shape in cross section the loops formed thereon are stretched across the top edges so that the bight portion of the loops is severed by the cutters in a perpendicular plane providing tufts with even ends.

Having thus described my invention, 1' claim:

1. In combination with a gauge type loom for weav- 3 ing pile fabrics, a shaft extending across. the gauges having a series of transverse slots, cutter blades mounted in said slots and extending into grooves formed in the upper edges of the gauges, and means for oscillating said shaft to rock said cutter blades to cut the pile loops formed on the gauges.

2. In combination with a gauge type loom for weaving pile fabrics having gauges with loop forming portions at their ends of U-shape in cross section, a shaft extending across the loop forming portions of the gauges having a series of transverse slots, arcuate cutting blades removably fitted in said slots and projecting beyond the periphery of said shaft into the loop forming portions of the gauges, and means for oscillating said shaft to rock said cutting blades to cut the loops formed on the gauges.

3. In combination with a gauge type loom for weaving pile fabrics having gauges with loop forming portions at their ends of U-shape in cross section, a shaft extending across the loop forming portions of the gauges having a series of transverse slots, arcuate cutting blades disposed in said slots and projecting beyond the periphery of said shaft into the loop forming portions of the gauges, stems integral with said blades extending through apertures formed in said shaft and intersecting said slots, means removably securing said blades in said slots, and means for oscillating said shaft to rock the cutting blades to cut the loops formed on the gauges.

4. In a gauge type loom for weaving pile fabrics, a plurality of gauges having loop forming portions with grooves in their upper edges opening through the free ends thereof, the upper edge of the free ends being inclined downwardly and a series of cutters disposed adjacent the free ends and movable longitudinally in the grooves in a direction opposite to the direction of movement of the loops along the loop forming portions.

5. In combination with a gauge type loom for weaving pile fabrics having gauges with loop forming portions at their free ends provided with grooves in their upper edges, a shaft extending across theloop forming portions of gauges, means for oscillating said shaft, and a series of blades mounted on said shaft having curved cutting edges adapted to move in the grooves of said gauges, said blades having an axis of rotation eccentric to theaxis of rotation of said shaft.

6. In a gauge type loom for weaving pile fabrics, a plurality of gauges having loop forming portions at their free ends, U-shaped extensions attached to the free ends of said gauge wires, a series of rockable cutter blades disposed above and projecting into said extensions, and means for rocking said blades to cut the loops formed on said gauges.

7. In a gauge type loom as described in claim 6 wherein the upper edge of said extensions are inclined down- Wardly at their free ends.

8. In a gauge type loom for weaving pile fabrics, a plurality of gauges having loop forming portions at their free ends provided with grooves in their upper edges, a shaft extending across the loop forming portions of said gauges above the grooves having a series of transverse slots, a series of blades mounted in said slots having loop forming portions of said gauges, said blades having an axis of rotation eccentric to the axis of rotation of said shaft and means for oscillating said shaft and blades. 9. In a gauge type loom for weaving pile fabrics, a plurality of gauges having loop forming portions at their free ends provided with grooves in their upper edges, a shaft extending across the loop forming portions of said gauges above the grooves, a series of blades mounted transversely of said shaft having curved cutting edges projecting into the grooves of the loop forming portions of said gauges, adjustable brackets supporting said shaft for raising and lowering said blades, and means for oscillating said shaft and blades.

10. In a gauge type loom for weaving pile fabrics, a plurality of gauges having loop forming portions provided with grooves in their upper edges, a shaft extending across the loop forming portions above the grooves having a series of transverse slots, a series of blades mounted in the slots of said shaft with one end extending a greater distance from the end of the slot then the other end, said blades having curved cutting edges'pro jecting into the grooves of the loop forming portions of said gauges, and means for oscillating said shaft and blades.

11. In a gauge type loom as described in claim 10 wherein said blades are removably mounted in said slots. 12. In a gauge type loom for Weaving pile fabrics, a plurality of gauges having loop forming portions provided with grooves in their upper edges, a shaft extending across the loop forming'portions above the grooves having a series of transverse slots, a series of arcuate blades mounted in said slots and projecting from the periphery of said shaft into the grooves of the loop forming portions of said gauges, said blades projecting from one end of said slots for a greater distance then at the other end, stems integral with said blades extending through said shaft, means carried by said shaft for engagement with said stems to secure the blades in said slots, and means for oscillating said shaft and blades.

13. In a gauge type loom for weaving pile fabrics, a plurality of gauges having pile forming portions provided with grooves in their upper edges, a rotatable shaft extending across said gauges above the loop forming portions, a series of curved blades mounted transversely of said shaft having their axis of rotation eccentric to the axis of rotation of said shaft, said blades projecting from said shaft into the grooves of the loop forming portions of said gauges, and means for oscillating said shaft and blades.

References Cited the file of this patent UNITED STATES PATENTS 702,788 Geczynski June 17, 1902 782,494 Dornan et al. Feb. 14, 1905 978,116 Crossland Dec. 6, 1910 FOREIGN PATENTS 407,364 Great Britain Mar. 16, 1934

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