DESC:FIELD OF INVENTION:

The present invention relates to flat sheets of bed linen with a hem finish and a method of preparing flat sheets of bed linen with a hem finish. In the present application, without single needle stitch for making hem, hem stitching is sewn with picotting using special folders as guide to make even hem size.

BACKGROUND AND PRIOR ART:
In the prior art, both the 1) hem and 2) mitered corners are stitched using single needle stitch with pattern (or) with folders. Then Picotting is done on face of the product. Here the single needle stitch holds the top hem and picotting is a decorative element. Hence, in the prior art, the picotting stitching was done along the single needle stitch as a guide, if there is any cross or bend in stitching affects the quality of picotting. Therefore, there are many drawbacks in prior art. For example, in the prior art, there are more number of operations required, more laborious, longer time spent and cost involved is high.

Thus, there is a need to develop a method of preparing flat sheets of bed linen with a hem finish which requires less number of operations; less labour required, shorter time required and low cost is involved.

In the present invention, the number of operation and operational cost is reduced upto 22% against conventional method. Here the picotting is sewn using folders and without single needle stitch, the picotting quality and hem size is even / consistent.

The present invention relates to flat sheets of bed linen with a hem finish and a method of preparing thereof. In the present application, without single needle stitch for making hem, hem stitching is sewn with Picotting using special folders as guide to make even hem size. The Picotting machine setting and Gross Beckett needle synchronization are engineered to the fabric ease to sew this functional Italian turn back hem.

In the prior art, operations of manufacturing, cutting for mitered corners was done manually which is very laborious and time consuming.

In comparison, in the present application, the cutting is being done by using an automatic CAM. Here the cut part is programmed on a computer and fed into the machine which reduces time, labour and provides consistent quality.

In the prior art, while stitching the hems the loose threads which protrude through the cut edge is removed by manual trimming and shearing, which too is time consuming and very laborious.

In comparison, in the present application, compressed air is blown through a fine nozzle, fixed close to the sewing area. The protruding threads are blown in to the seam, thereby the manual work of trimming the loose threads is totally eliminated.

In the prior art, the picotting hole and the stitch made in the fabric will reduce the strength of the fabric. The impact is more in case of delicate fabrics.

In comparison, in the present application, an extra thread is reinforced on both sides of the picotting holes. This enhance the strength of fabric in the picotting area and the seam as well. An exclusively designed guide like attachment has been devised and fixed to the sewing machine which help to feed the extra thread uniformly in to the seam.

Thus, in the present invention, the number of operation and operational cost is reduced upto 22% against conventional method. Here, the picotting is sewn using folders and without single needle stitch, the picotting quality and hem size is even / consistent. Therefore, this method requires less labour and saves time.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:

Figure 1 illustrates a hem stitching sewn with Picotting using special folders as guide to make even hem size as described in the present invention. This is Top Hem Diagonal Picoting Stich [expanded version of Fig. 6 (a) of the present invention].

Figure 2 (a): Side hem stiching according to the present invention is shown in Fig. 2 (a).

Figure 3 (a): Bottom hem stiching according to the present invention is shown in Fig. 3 (a).

Figure 4 (a): Top hem Picotting Stiching according to the present invention is shown in Fig. 4 (a). It shows picoting with extra reinforced stich.

Figure 5 (a): Diagonal Cutting according to the present invention is shown in Fig. 5 (a).

Figure 6(a): Top Hem Diagonal picoting stich according to the present invention is shown in Fig. 6 (a). The expanded version of fig. 6 (a) is shown in Fig. 1.

Drawings related to prior art : Figures 2 (b), 3 (b), 4(b), 5(b), 6(b) relates to prior art and these drawings has been included for making comparison with the prior art.

Fig. 2 (b) shows conventional method used in side hem stiching of Prior Art.

Fig. 3 (b) shows conventional method used in bottom hem stiching of Prior Art.

Fig. 4 (b) shows conventional method used in top hem picoting stiching of Prior Art.

Fig. 5 (b) shows conventional method used in diagonal Cutting of Prior Art.

Fig. 6 (b) shows conventional Picotting Stitch of Prior Art.

SUMMARY OF PRESENT INVENTION:

The present invention relates to flat sheets of bed linen with a hem finish and a method of preparing thereof. In the present application, without single needle stitch for making hem, hem stitching is sewn with Picotting using special folders as guide to make even hem size.

DETAILED DESCRIPTION OF THE INVENTION:
The present invention relates to flat sheets of bed linen with a hem finish and a method of preparing thereof.

In the present application, without single needle stitch for making hem, hem stitching is sewn with Picotting using special folders as guide to make even hem size. The Picotting machine setting and Gross Beckett needle synchronization are engineered to the fabric ease to sew this functional Italian turn back hem.

Hem-Picotting: In the present application, the method of preparing flat sheets of bed linen with a hem finish comprises of Hem- Picotting starting on back side of product from top/side hem at 4” and is sewn horizontally without single needle stitch on the back hem edge using folders as guide for even hem. The picotting is stopped before 4” of side hem. Picotting (Functional) sewn horizontally holds the hem. The Picotting holes are stitched on reverse of the product which makes holes of different shape.

Mitered Corners: The sew allowance turned towards the hem on mitered corner and sew picotting diagnolly without single needle stitch using mitered pattern with back tack secure Joints on start. The sew allowance turned towards hem on mitered corner and sew picotting diagnolly with back tack secure Joints on start and again turned to vertical facing towards the body upto 10” of the product without removing the needle from product with back tack in picotting itself which secure the threads from unravelling. On the 2nd side for sewing convenience, the mitered corner picotting starts from 4” hem where the horizontal picotting ends and stitched diagonally to top of flat with back tack stitch. Picotting starts from 4” where the horizontal picotting ends and sewn towards the body upto 10” with back tack.

Referring now to the drawings, there is shown an illustrative embodiment of the method of preparing flat sheets of bed linen with a hem finish and prepared flat sheets of bed linen with a hem finish . It should be understood that the invention is susceptible to various modifications and alternative forms; specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It will be appreciated as the description proceeds that the invention may be realized using different embodiments.

Before describing in detail embodiments it may be observed that the novelty and inventive step that are in accordance with the present invention method of preparing flat sheets of bed linen with a hem finish and prepared flat sheets of bed linen with a hem finish, accordingly, the drawings are showing only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

Figure 1 of the present invention illustrates a hem stitching sewn with Picotting using special folders as guide to make even hem size as described in the present invention. This is Top Hem Diagonal Picoting Stich [expanded version of Fig. 6 (a) of the present invention].

In the present application, flat sheets of bed linen with a hem finish do not have a single needle stitch for making hem; hem stitching is sewn with Picotting using special folders as guide to make even hem size as show in Figure 1. The Picotting machine setting and Gross Beckett needle synchronization are engineered to the fabric ease to sew this functional Italian turn back hem. The Sewing thread size is Tex 27 or 40 Core spun polyester thread and needle size required is Gross beckett 727 needle – 14. Picotting SPI is 6 - 8 , Single Needle sewing SPI is 10 – 12. Picotting machine speed is 2500 rpm. Picotting holes will be different to different types of fabrics ,hence Needle size and thread to select accordingly.

In one of the embodiment of the present invention, the cutting is being done by using an automatic CAM. Here the cut part is programmed on a computer and fed into the machine which reduces time, labour and provides consistent quality.

In yet another embodiment of the present invention, compressed air is blown through a fine nozzle, fixed close to the sewing area. The protruding threads are blown in to the seam, thereby the manual work of trimming the loose threads is totally eliminated.

In another embodiment of the present invention, an extra thread is reinforced on both sides of the picotting holes. This enhances the strength of fabric in the picotting area and the seam as well. An exclusively designed guide like attachment has been devised and fixed to the sewing machine which help to feed the extra thread uniformly in to the seam. The is more beneficial in case of delicate fabrics.

Method of preparing flat sheets of bed linen with a hem finish
A method of preparing flat sheets of bed linen with a hem finish comprising of steps:-

a) on flat sheets of bed linen, sewing side hem ranging from 1/4” to 1” on both sides, double turned with single needle lock stitch SPI 10 -12;

b) sewing bottom hem about 1” on bottom, double turned for ¼ to 1” sew allowance with single needle lock stitch SPI 10 -12;

c) turning sew allowance ranging from 1/4” to 1”, folding for 2” to 6” hem to back, picotting starting on back side of product from top/side hem at 4” and sewing horizontally without single needle stitch on the back hem edge using folders as guide for even hem size and the picotting is stopped before 4” of side hem;

d) folding mitered corner on both sides approximately 45 degree angle and cutting extra fabric in angle with sew allowance apart;

e) turning the sew allowance towards the hem on mitered corner, sew picotting diagonally without single needle stitch using mitered pattern with back tack secure joints on start and again turned to vertical facing towards the center of the product upto 10”, without removing the needle from product with back tack in picotting itself which secure the threads from unraveling;

f) on 2nd side, the mitered corner picotting starting from 4” hem where the horizontal picotting ends and stitching diagonally to top of flat with back tack stitch;

g) picotting starting from 4” and sewing towards the body upto 10” with back tack and obtaining flat sheets of bed linen with a hem finish.

EXAMPLES OF THE PRESENT INVENTION

Example 1
Flat sheets of bed linen with a hem finish is prepared by sewing side hem - 3/8” on both sides, double turned with Single needle lock stitch SPI 12. Bottom hem – 1” is sewn on bottom, double turned 1/2” sew allowance with single needle lock stitch SPI 12. 1/2” sew allowance is turned, then 4” hem is folded back. The Picotting holes on product face are stitched on reverse of product to make holes in different shape. Picotting starts on back side from top/side hem at 4” to be sewn on the back hem edge and to sew horizontally along the widthside to stop before 4”. Picotting sewn horizontally holds the hem. The Mitered corner is folded on both sides exactly 45 degree angle and the extra fabric is cut in angle with sew allowance apart. The sew allowance is turned towards hem on mitered corner and picotting is sewn diagnolly with back tack secure Joints on start and again turned to vertical facing towards the body upto 10” of the product without removing the needle from product with back tack in picotting itself which secure the threads from unravelling. 2nd side due to sewing convenience, the mitered corner picotting is started from 4” hem and is stitched diagonally to top of flat with back stitch. Picotting is started from 4” and is sewn towards the body upto 10” with back tack . The Sewing thread size is 40 Core spun polyester thread and needle size is Gross beckett 727 needle – 14, picotting SPI is 8, single needle sewing SPI is 12. Picotting machine speed is 2500 rpm. Therefore, flat sheets of bed linen with a hem finish is prepared by the method as described above.

Example 2
Flat sheets of bed linen with a hem finish is prepared as given below : -
Sew Side hem - 3/8” on both sides, double turned with Single needle lock stitch SPI 10 -12. Compressed air is blown through a nozzle towards the hem to clip the protruding loose threads into the hem. This reduces the operation of trimming and hence the labour. Side hem stiching according to the present invention is shown in Fig. 2 (a).

Sew bottom hem – 1” on bottom, double turned 1/2” sew allowance with single needle lock stitch SPI 10 -12. Here also the compressed air is blown thro’ a nozzle towards the hem to clip the protruding loose threads into the hem. This reduces the operation of trimming and hence the labour. Bottom hem stiching according to the present invention is shown in Fig. 3 (a).

Turn 1/2” sew allowance ,then to fold 4” hem to back (size of top hem may be different depends on requirement). The Picotting holes on product face are stitched on reverse of product to make holes in diff shape. Picotting starts on back side from top/side hem at 4” to be sewn on the back hem edge and to sew horizontally along the widthside to stop before 4”. Picotting sewn horizontally holds the hem. Picotting is done with extra reinforced stitch using customized attachments without single needle stitch. Top hem Picotting Stiching according to the present invention is shown in Fig. 4 (a). It shows picoting with extra reinforced stich.

To fold the Mitered corner on both sides exactly 45 degree angle and to cut the extra fabric in angle with sew allowance apart. The mitered corners are cut in cutting stage itself using automatic cutting machine. Diagonal Cutting according to the present invention is shown in Fig. 5 (a).

The sew allowance turned towards hem on mitered corner and sew picotting diagnolly with back tack secure Joints on start and again turned to vertical facing towards the body upto 10” of the product without removing the needle from product with back tack in picotting itself which secure the threads from unravelling. The sew allowance turned towards the hem on mitered corner picotting is sewn diagonally without single stitch with back tack secure joints on start. Top Hem Diagonal picoting Stich according to the present invention is shown in Fig. 6 (a). The expanded version of fig. 6 (a) is shown in Fig. 1. For comparison, Fig. 6 (b) shows conventional Picotting Stitch of Prior Art.

2nd side due to sewing convenience, the mitered corner picotting starts from 4” hem and to stitch diagonally to top of flat with back stitch.

Picotting starts from 4” and sew towards the body upto 10” with back tack.
Therefore, flat sheets of bed linen with a hem finish is prepared.

FLAT SHEETS OF BED LINEN WITH A HEM FINISH
Flat sheets of bed linen with a hem finish is prepared by the method as described throughout the specification e.g. examples 1 & 2 and drawings.

In the present invention, the number of operation and operational cost is reduced upto 22% against conventional method. Here the picotting is sewn using folders and without single needle stitch, the picotting quality and hem size is even / consistent.

The previous description is provided to enable any person skilled in the art to practice the various embodiments described herein. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments. Thus, the claims are not intended to be limited to the embodiments shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean "one and only one" unless specifically so stated, but rather "one or more." Structural and functional equivalents to the elements of the various embodiments described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims.

ADVANTAGES:
1. The present invention provides a method which requires less number of operations; less labour required, shorter time required and low cost is involved.

2. The present invention provides a method in which the picotting is sewn using folders and without single needle stitch, the picotting quality and hem size is even / consistent.

3. In the present application, compressed air is blown through a fine nozzle, fixed close to the sewing area. The protruding threads are blown in to the seam, thereby the manual work of trimming the loose threads is totally eliminated.

4. In the present application, an extra thread is reinforced on both sides of the picotting holes. This enhances the strength of fabric in the picotting area and the seam as well. An exclusively designed guide like attachment has been devised and fixed to the sewing machine which help to feed the extra thread uniformly in to the seam.

CLAIMS:1.

A method of preparing flat sheets of bed linen with a hem finish, said method comprising of steps:-

a) on flat sheets of bed linen, sewing side hem ranging from 1/4” to 1” on both sides, double turned with single needle lock stitch SPI 10 -12;

b) sewing bottom hem about 1” on bottom, double turned for ¼ to 1” sew allowance with single needle lock stitch SPI 10 -12;

c) turning sew allowance ranging from 1/4” to 1”, folding for 2” to 6” hem to back, picotting starting on back side of product from top/side hem at 4” and sewing horizontally without single needle stitch on the back hem edge using folders as guide for even hem size and the picotting is stopped before 4” of side hem;

d) folding mitered corner on both sides approximately 45 degree angle and cutting extra fabric in angle with sew allowance apart;

e) turning the sew allowance towards the hem on mitered corner, sew picotting diagonally without single needle stitch using mitered pattern with back tack secure joints on start and again turned to vertical facing towards the center of the product upto 10”, without removing the needle from product with back tack in picotting itself which secure the threads from unraveling;

f) on 2nd side, the mitered corner picotting starting from 4” hem where the horizontal picotting ends and stitching diagonally to top of flat with back tack stitch; and

g) picotting starting from 4” and sewing towards the body upto 10” with back tack and obtaining flat sheets of bed linen with a hem finish.

2. The method as claimed in claim 1, wherein compressed air is blown through a nozzle towards the hem to clip the protruding loose threads into the hem.

3. The method as claimed in claim 1, wherein picotting sewn horizontally holds the hem and the picotting holes are stitched on reverse of the product which makes holes of different shape in step (c).

4. The method as claimed in claim 1, wherein picotting is performed with extra reinforced stitch using customized attachments without single needle stitch in step (c).

5. The method as claimed in claim 1, wherein the mitered corners are cut in cutting stage itself using automatic cutting machine in step (d).

6. The method as claimed in claim 1, wherein picotting is sewn using folders and without single needle stitch and the hem size is even / consistent.

7. Flat sheets of bed linen with a hem finish prepared by the method as claimed in claim 1.