comforter

A comforter with a down-filled central part and feather-filled side edges, separated by a sewn boundary, addresses uneven distribution and cold feet issues, enhancing comfort and thermal insulation while reducing costs.

JP3256164UActive Publication Date: 2026-06-08SENTASS CO LTD

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Utility models
Current Assignee / Owner
SENTASS CO LTD
Filing Date
2026-04-10
Publication Date
2026-06-08

AI Technical Summary

Technical Problem

Conventional futon covers filled with feathers experience uneven distribution of filling over time, leading to reduced comfort, lightness, and heat retention, and cold feet issues due to insufficient down in the footrest area.

Method used

A comforter design with a central part filled with down and side edges filled with feathers, separated by a sewn boundary, to maintain comfort and warmth while reducing costs.

Benefits of technology

The design maintains comfort, lightness, and heat retention while suppressing heat loss from the sides and coldness in the feet, achieving cost-effectiveness and improved thermal insulation.

✦ Generated by Eureka AI based on patent content.

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Abstract

We offer a comforter that is affordable, effectively prevents cold feet, and maintains the comfort, lightness, and warmth of traditional down comforters. [Solution] The comforter 10 according to the present invention is a comforter comprising a roughly rectangular central portion 11 and longitudinal side ends 12 of the central portion 11. The boundary 13 between the central portion 11 and the side ends 12 is sewn together, the central portion 11 is filled with down, and the side ends 12 are filled with feathers. Preferably, the central portion 11 and the side ends 12 are each subjected to quilting 11-1, 12-1.
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Description

Technical Field

[0001] This invention relates to a futon cover.

Background Art

[0002] A futon cover is used by covering a user on a mattress or a mat. From the viewpoints of the comfort of covering, lightness, and heat retention, a futon cover filled with feathers as stuffing is widely popular. The futon cover has a width that hangs down on the side of the mattress or the mat in order to suppress the heat radiation between the futon cover and the mattress or the mat.

[0003] However, when the futon cover is used for a long time, the feathers inside tend to be unevenly distributed at the side ends that hang down on the side of the mattress or the mat. For this reason, the comfort of covering, lightness, and heat retention of the futon are impaired.

[0004] Therefore, for example, Patent Document 1 discloses a futon cover that divides the futon cover into a central part, side ends of the futon cover, and foot ends, and the boundaries of each region are sewn. The document also discloses that, in addition to the saving effect, the amount of feathers at the side ends and the foot ends is less than that at the central part so that it is easier to puff up.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] As mentioned above, although the comforter described in Patent Document 1 is filled with a material that has a low amount of down, the footrest area is also filled with a material that has a low amount of down. However, cold feet can hinder the onset of sleep. Furthermore, although it is clearly stated that the amount of down at the side edges is less than the amount of down in the center, this also includes cases where, for example, the amount of down in the center filling is 51% of the total volume, and the amount of down in the side edge filling is 49% of the total volume. When such configurations are included, the saving effect is hardly realized.

[0007] The objective of this invention is to provide a comforter that is inexpensive, suppresses coldness in the feet, and maintains the comfort, lightness, and heat retention of conventional down comforters. [Means for solving the problem]

[0008] The inventor decided to use down feathers for the central part of the filling and feathers only for the side edges. To prevent the fillings from mixing during use, the boundary between the central part and the side edges was sewn, similar to the comforter described in Patent Document 1.

[0009] This allows for lower prices while maintaining the comfort, lightness, and warmth of conventional down comforters thanks to the down in the center. Furthermore, since feathers are heavier than down, it has been found that the weight of the sides helps to suppress heat loss from the user.

[0010] In addition, from the perspective of suppressing coldness in the feet, we decided against using foot covers as described in Patent Document 1. As a result, the filling near the feet is made of down, which suppresses coldness in the feet. It might seem that having foot covers would suppress heat loss, but we have found that the heat loss is sufficiently suppressed because the filling at the side edges is feather. The invention derived from these findings is as follows:

[0011] (1) A comforter comprising a roughly rectangular central section and longitudinal side ends of the central section, wherein the boundary between the central section and the side ends is sewn, the central section is filled with down, and the side ends are filled with feathers.

[0012] (2) The comforter as described in (1), wherein the central part and each of the side edges are quilted. [Brief explanation of the drawing]

[0013] [Figure 1] Figure 1 is a perspective view showing a comforter according to the present invention. [Modes for carrying out the invention]

[0014] The present invention will be described in detail below, but is not limited thereto. Furthermore, each embodiment can be combined in various ways.

[0015] Figure 1 is a perspective view showing a comforter 10 according to the present invention. The comforter 10 consists of a roughly rectangular central part 11 and longitudinal side ends 12 of the central part 11. The dimensions of the comforter 10 are approximately 200-250 cm in length and 150-200 cm in width, preferably 210 cm in length and 180 cm in width. The dimensions of the central part can be appropriately selected according to the size of the futon or mattress.

[0016] The width of the side edges should be approximately 10 to 40 cm, preferably around 20 cm. Within this width range, the edges will hang down over the sides of the futon or mattress, thereby suppressing heat loss from the user.

[0017] The futon 10 according to the present invention is composed of side fabrics and stuffing filled in the side fabrics, similar to conventional futons. And the boundary 13 between the central part 11 and the side end part 12 is sewn. Therefore, even if the stuffing in the central part 11 and the stuffing in the side end part 12 are made of different materials, the two stuffings will not be mixed and can continue to perform their respective functions.

[0018] The stuffing in the central part 11 that constitutes the futon 10 according to the present invention is down. Therefore, the futon 10 maintains the comfortable feeling, lightness, and heat retention of conventional feather futons.

[0019] Also, the stuffing in the side end part 12 that constitutes the futon 10 according to the present invention is feathers. Since feathers are less expensive than down, the cost of the futon 10 can be reduced. Also, since the specific gravity of feathers is greater than that of down, when used as the stuffing in the side end part 12, it is likely to hang down the side of the mattress or the futon. Thereby, the heat dissipation of the warm air is likely to be suppressed, and accordingly, there is no need to separately provide a foot end part as in the case of conventional futons.

[0020] The futon 10 according to the present invention is subjected to quilting on the central part 11 and the side end part 12. Each quilting part 11-1 and 12-1 is sewn. Thereby, the uneven distribution of the down or feathers of the stuffing that may occur during use can be retained within the quilting parts 11-1 and 12-1. Thereby, even after being used for many years, the respective functions of the central part 11 and the side end part 12 are maintained.

[0021] Thus, the futon 10 according to the present invention can achieve cost reduction, suppress the coldness of the feet, and moreover, maintain the comfortable feeling, lightness, and heat retention of conventional feather futons.

Explanation of Reference Numerals

[0022] 10 Futon, 11 Central part, 11-1 Quilting part (of the central part), 12 Side end part, 12-1 Quilting part (of the side end part), 13 Boundary (between the central part and the side end part)

Claims

1. A comforter comprising a roughly rectangular central portion and longitudinal side ends of the central portion, wherein the boundary between the central portion and the side ends is sewn, the central portion is filled with down, and the side ends are filled with feathers.

2. The comforter according to claim 1, wherein the central portion and the side ends are each quilted.