JPH07309468A - Duplicate feed preventive member and manufacture thereof - Google Patents

Abstract

PURPOSE:To reliably prevent duplicate feed at paper sheet feeding time by forming a hardened coat by impregnating unfoamed liquid elastomer in a continuous foaming type elastomer surface and a continuous foam inside surface. CONSTITUTION:A drum 10 is rotatably supported around the axis, and a nozzle 12 to flow down unfoamed liquid elastomer to the drum is arranged in the vicinity of an outer peripheral surface of the drum 10. When a core material 14 is impregnated with the unfoamed liquid elastomer in a position brought into pressure contact with the drum 10, the nozzle 12 is situated in one end part of the drum 10, and while making the unfoamed liquid elastomer flow down from the nozzle 12, the nozzle 12 is repeatedly moved by the prescribed number of times toward the other part of the drum 10. Next, after impregnation into the core material 14 is finished, hardening processing is performed, for example, at 100 deg.C for 30 minutes. Thereby, a duplicate feed preventive rubber roller excellent in abrasion resistance can bee manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various office automation equipment such as copying machines.
The present invention relates to a double feed prevention member used for a device, a financial terminal device, and the like, which is used for a paper feed roller or the like for preventing a plurality of sheets of paper from being fed at the same time (double feed), and a manufacturing method thereof. A multi-feed preventing member that has a porous structure on the surface and can reliably prevent double-feed, and has excellent wear resistance,
And a manufacturing method thereof.

[0002]

2. Description of the Related Art As shown in FIG. 3, a double feed preventing rubber roller 20 used in various kinds of OA equipment such as copying machines and financial terminal equipment is rotatable and pressed against a conveying roller 22. The paper 24 is conveyed by rotating the conveying roller 22 while being sandwiched between the double feed preventing rubber roller 20 and the conveying roller 22. In this case, the transport roller 22
When a plurality of sheets of paper 24 are sandwiched and sandwiched between the double feed preventing rubber roller 20 and the double feed preventing rubber roller 20, the double feed preventing rubber roller 2
Due to the frictional force between 0 and the paper 24 in contact therewith, the paper 2
Double feeding of 4 is prevented.

By the way, in the double feed preventing rubber roller 20, the nip width (the region where the conveying roller 22 and the double feed preventing rubber roller 20 are in contact with each other so that a sufficient frictional force can be applied to the paper contacting the same). Paper feed direction length,
That is, there is a demand for ensuring a sufficient length W in the direction of the arrow A in FIG.
Are also required to have sufficient wear resistance. Therefore,
Conventionally, independent foaming or continuous foaming type urethane rubber is used as the core material of the double feed preventing rubber roller 20 so that the nip width W is relatively flexible and sufficient, and the foaming type urethane rubber is There is known a double feed preventing rubber roller impregnated with unfoamed liquid urethane rubber for the purpose of improving abrasion resistance (US Pat. No. 4,287,649).

The outline is as follows. That is, as shown in FIG. 4, a part of the outer peripheral surface of the drum 26 is immersed in the unfoamed liquid urethane rubber 30 stored in the storage tank 28. In addition, a core material 32 made of urethane foam of independent foaming or continuous foaming type is arranged on the outer peripheral surface of the drum 26 in the vicinity of a portion not immersed in the unfoamed liquid urethane rubber 30. By rotating 32 and the drum 26, the unfoamed liquid urethane rubber 30 adhering to the outer peripheral surface of the drum 26 is impregnated over the entire outer periphery of the core material 32 to prevent the double feed rubber roller 2.
0 is manufactured.

However, in the above method, the unfoamed liquid urethane rubber 30 is buried in the air bubbles in the surface portion of the core material 32 to form a skin layer on the surface, and a pattern of open cells remains on the surface. There is no. The problem that the unfoamed liquid urethane rubber 30 closes the openings of the air bubbles on the surface of the core material occurs particularly when the impregnated core material 32 is separated from the drum 26. When separated, the unfoamed liquid urethane rubber 30 on the surface of the drum 26 is attracted to the core material 32 and closes the openings of the open cells on the surface of the core material 32.

In such a state, paper dust or the like generated when the paper 24 is conveyed cannot enter the air bubbles, and the surface of the double feed preventing rubber roller 20 (the portion in contact with the paper 24).
Adhere to. Therefore, the double feed preventing rubber roller 2 is gradually
There is a problem that the coefficient of friction between 0 and the paper 24 becomes small, and reliable double feed cannot be prevented.

[0007]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a double feed preventing member which can surely prevent double feed and is excellent in wear resistance, and a method for manufacturing the same.

[0008]

The present invention has been proposed to achieve the above object, and is characterized by having the following constitution. That is, according to the present invention, there is provided a double-feed preventing member in which the surface of the continuous foamed elastomer and the inner surface of the continuous cells are impregnated with the unfoamed liquid elastomer and a cured coating is formed. Further, according to the present invention, there is provided a double-feed preventing member which is a roller-shaped member.
Further, according to the present invention, a multi-feed preventing member which is a sheet-like material is provided. Further, according to the present invention, there is provided a double feed preventing member in which the unfoamed liquid elastomer is an ether-based unfoamed liquid elastomer. Further, according to the present invention, there is provided a double feed preventing member in which the ether type unfoamed liquid elastomer is an ether type unfoamed liquid urethane rubber. Further, according to the present invention, there is provided a double feed preventing member in which the continuous foaming elastomer is an ether-based continuous foaming elastomer. Further, according to the present invention, there is provided a double feed preventing member in which the ether-based continuous foaming elastomer is an ether-based continuous foaming urethane rubber.

Further, according to the present invention, on the outer peripheral surface of the substantially cylindrical core material formed of the continuous foaming elastomer,
A method for manufacturing a double feed preventing member for preventing double feed of paper, comprising supplying an unfoamed liquid elastomer adhered to an outer peripheral surface of a rotating drum to impregnate the unfoamed liquid elastomer, the method comprising: An unfoamed liquid elastomer flowing step of flowing down an unfoamed liquid elastomer on the outer peripheral surface, and a drum in which the unfoamed liquid elastomer is flowed down in a state where the outer peripheral surface of the drum is pressed against the outer peripheral surface of the drum,
And a pressure contact rotation step of rotating the core material, which provides a method for manufacturing a multi-feed preventing member.

Further, according to the present invention, there is provided a method of manufacturing a double feed preventing member using a sheet-shaped continuous foamed elastomer member wound around a shaft instead of the core member. Further, according to the present invention, there is provided a method for manufacturing a double feed preventing member in which the unfoamed liquid elastomer flowing down step is completed before the pressure contact rotating step is completed. Further, according to the present invention, there is provided a method for producing a double feed preventing member in which the unfoamed liquid elastomer is an ether-based unfoamed liquid elastomer. Further, according to the present invention, there is provided a method for producing a double feed preventing member in which the ether type unfoamed liquid elastomer is an ether type unfoamed liquid urethane rubber. Further, according to the present invention, there is provided a method for producing a double feed preventing member in which the continuous foaming elastomer is an ether-based continuous foaming elastomer. Further, according to the present invention, there is provided a method for producing a double feed preventing member in which the ether continuous foaming elastomer is ether continuous foaming urethane rubber.

[0011]

DETAILED DESCRIPTION OF THE INVENTION The technical feature of the multi-feed preventing member according to the present invention is that the surface of the continuous foam type elastomer and the inner surface of the continuous cells are impregnated with the unfoamed liquid elastomer to form a cured coating. In the double feed preventing member of the present invention, the unfoamed liquid elastomer is impregnated along the inner surface of the open cells without leaving the spaces in the open cells of the continuous foam type elastomer.

Since the multi-feed preventing member according to the present invention is configured as described above, it is provided with flexibility and has a nip width (the multi-feed preventing member and a conveyer for conveying a paper sheet in pressure contact with the multi-feed preventing member). The length of the area in which the rollers come into contact with each other in the paper transport direction can be sufficiently secured, and the paper dust generated during paper feeding is
Since it can enter into the continuous bubbles, the surface of the double feed preventing member is not covered with the paper powder, and the effect of preventing the double feed is sufficiently exerted. In addition to this, since the unfoamed liquid elastomer is impregnated as described above, the durability can be improved.

The technical feature of the method of manufacturing the double feed preventing member according to the present invention is that the non-foamed material adhered to the outer peripheral surface of the rotating drum is attached to the outer peripheral surface of the core material made of the continuous foaming elastomer. A method for producing a double-feed preventing member comprising supplying a liquid elastomer to impregnate an unfoamed liquid elastomer, the unfoamed liquid elastomer flowing step of flowing down the unfoamed liquid elastomer to the outer peripheral surface of the drum, and the outer peripheral surface of the drum. The method further includes a drum in which the unfoamed liquid elastomer is flowed down while the outer peripheral surface of the core material is in pressure contact, and a pressure contact rotation step of rotating the core material. According to the manufacturing method of the first aspect, the double feed preventing member in the form of a roll is manufactured.

The technical feature of the method of manufacturing the double feed preventing member according to the second aspect of the present invention is that the continuous foamed elastomer sheet is wound around a shaft instead of the core material of the first aspect. The point is to use a manufacturing member. this,
In the method for manufacturing the double feed preventing member according to the second aspect, the continuous foamed elastomer is sliced into a sheet having a thickness of 2 mm to 4 mm, and is wound around a cylindrical shaft. In this wound state, both ends of the sheet are adhered to each other with an adhesive or the like to fix the sheet to the shaft. This sheet is pressed against the outer peripheral surface of the drum, and the drum and the shaft on which the unfoamed liquid elastomer has flowed are rotated. As a result, the unfoamed liquid elastomer is impregnated into the surface of the continuously foamed elastomer and the inner surface of the open cells. The impregnated sheet is further dried and cured. Before and after this dry curing, the sheet is removed from the shaft and cut into a predetermined size to obtain a sheet-like multi-feed preventing member.

In the manufacturing methods of the first and second aspects, the unfoamed liquid elastomer is attached to the outer peripheral surface of the drum, and the adhering unfoamed liquid elastomer is pressed against the drum to a core material or a shaft. It is impregnated into a wound sheet-like continuous foaming elastomer (hereinafter sometimes referred to as a core material or the like). As described above, in the manufacturing method of the first aspect and the second aspect, the continuous foaming type elastomer is used as the material of the core material and the like, and the unfoamed liquid elastomer is brought into contact with it in a pressurized state, The unfoamed liquid elastomer sufficiently impregnates the inside of the air bubbles and covers only the surface along the air bubbles while leaving the air bubbles on the surface of the core material, etc. (The length in the paper conveyance direction of the region where the double feed prevention member and the conveyance roller that is pressed against the double feed prevention member and conveys the paper are in contact) can be sufficiently secured. Further, the paper dust generated during the paper feeding enters the bubble portion, so that the surface is not covered with the paper dust, and the effect of preventing double feeding is exhibited, and the continuous foamed elastomer is not foamed liquid elastomer. Since it is impregnated with, it also has sufficient durability.

In addition to this, in the manufacturing methods of the first and second aspects, since the core material and the like are pressed against the drum, the unfoamed liquid elastomer adhered to the drum surface in the unfoamed liquid elastomer flow down step. Can be impregnated into the open cell openings. Therefore, the pattern of open cells remains on the surface without blocking the openings of the open cells, and even if paper dust or the like is present, the paper dust is taken into the open cells. Therefore, it is possible to prevent the paper dust from adhering to the surface of the multi-feed preventing member (the surface that comes into contact with the paper), and the friction coefficient does not decrease, so that the multi-feed can be reliably prevented.

Further, in the method of manufacturing the double feed preventing member according to the third aspect of the present invention, in the method of manufacturing the double feed preventing member according to the first and second aspects, before the completion of the pressure contact rotation step, Since the foamed liquid elastomer flow down step is completed, most of the unfoamed liquid elastomer attached to the drum surface is impregnated into the open cells of the continuous foamed elastomer in the pressure contact rotation step. The residual amount of elastomer can be reduced. Accordingly, when the impregnated core material or the like is separated from the drum, it is possible to sufficiently prevent the unfoamed liquid elastomer on the drum surface from migrating to the surface of the impregnated core material or the like. The opening of the bubble is not blocked.

In the present invention, as the continuous foaming type elastomer, ester type continuous foaming type urethane rubber, ether type continuous foaming type urethane rubber and the like can be used. However, from the viewpoint of hydrolysis, the ether type continuous foaming type elastomer is used. preferable. Among the ether-based continuous foaming type elastomers, it is particularly preferable to use the ether-based continuous foaming type urethane rubber.

The hardness of the continuous foamed elastomer is
10 kg / 314 cm ² to 100 kg / 314 cm ² ,
In particular, 20 kg / 314 cm ² to 60 kg / 314 cm
^It is preferably ² . Hardness is 20 kg / 314 cm ²
If it is smaller, the nip width will be too large and jam will tend to occur, and if it is larger than 60 kg / 314 cm ² , the nip width will tend to be smaller.

Further, as the unfoamed liquid elastomer,
Ether-based unfoamed liquid urethane rubber, ester-based unfoamed liquid urethane rubber, etc. can be used, but in terms of hydrolysis,
It is preferable to use an ether type unfoamed liquid elastomer. Among these, it is particularly preferable to use an ether type unfoamed liquid urethane rubber.

In the present invention, in the unfoamed liquid elastomer flow-down step, the unfoamed liquid elastomer flow-down means to be used is not particularly limited as long as it can supply an appropriate amount to the outer peripheral surface of the drum. Of moving the unfoamed liquid elastomer from the nozzle while moving in the axial direction of the nozzle (hereinafter, may be referred to as "nozzle moving method"), or by moving the nozzle in the axial direction of the drum near the outer peripheral surface of the drum. It is possible to employ a method in which a plurality of nozzles are arranged along the nozzles and the unfoamed liquid elastomer flows down from the respective nozzles substantially at the same time.

The flow rate of the unfoamed liquid elastomer in the unfoamed liquid elastomer flowing step varies depending on the outer dimensions of the core material to be impregnated, etc., but it is 1 to 10 cm ³ / Seconds,
In particular, it is preferably 2 to 3 cm ³ / sec. 1c
If it is less than m ³ / sec, the wear resistance tends to be poor,
If it is more than 5, it becomes hard and the nip width tends to decrease.

Further, the pressure in the case of pressing the core material and the like to the drum, the outer dimensions of the core material such as, varies depending hardness, etc., 50 to 500 g / cm ^2, in particular, to 100 to 200 g / cm ² Is preferred. 50 g / cm
^If it is less than ² , the inside may not be sufficiently impregnated, and if it is more than 500 g / cm ² , the impregnation may be too deep inside.

Further, in the present invention, the friction coefficient between the paper and the double feed preventing rubber roller varies depending on the friction coefficient between the papers, but the friction coefficient between the papers is 0. In the case of 3 to 0.6, 0.8 to 1.4 is preferable. If the friction coefficient between the double feed preventing rubber roller and the paper is smaller than 0.6, double feed tends to occur.

The rubber roller for preventing double feeding of the present invention is
The outer peripheral surface is used in pressure contact with the outer peripheral surface of the conveying roller, and the nip width in this case is preferably 0.5 to 3 cm. This is because if the nip width is smaller than 0.5 cm, sufficient frictional force cannot be applied to the paper and double feed cannot be prevented reliably. If the nip width exceeds 3 cm, jam tends to occur. It is in.

Further, in the present invention, specifically, the drum, the core material and the like are each supported by a supporting member so as to be rotatable in the axial direction, and the drum is rotationally driven around the axial line by the rotational driving means. It is configured to do so. In this case, the core material or the like may be rotationally driven by the rotation driving means, and the core material or the like is configured to follow the rotation of the drum without being forcibly rotated. You may.
In the case where the core material or the like is forcibly rotated by the rotation driving means, the core material or the like is kept rotated by the rotation driving means even when the impregnated core material or the like is separated from the drum. It is preferable to idle-rotate the core material and the like in a state where the core material and the like are separated from the drum, from the viewpoint of preventing the openings of the open cells on the surface of the core material and the like from being closed. Even when the core member or the like is not forcedly rotated, the core member or the like is configured to be in a rotated state due to inertia after the core member or the like is separated from the drum,
It is preferable from the viewpoint of preventing the openings of the open cells on the surface of the core material or the like from being closed.

The method for producing the multi-feed preventing member according to the present invention will be specifically described below by taking a method of impregnating the core material with the unfoamed liquid elastomer as an example. The drum 10 shown in FIGS. 1A and 1B is rotatably supported around its axis, and is rotated by a rotation driving means (not shown). A nozzle 12 for causing the unfoamed liquid elastomer to flow down to the drum is provided near the outer peripheral surface of the drum 10. This nozzle 1
2 is supported by a moving unit (not shown) so as to be capable of reciprocating in the axial direction of the drum 10 (direction of arrow A in FIG. 1A). Further, the core material 14 is press-fitted into the core metal 19, is rotatable by a supporting member (not shown), and is capable of reciprocating between a position where it is pressed against the drum 10 and a position where it is separated from the drum 10. It is supported.

Here, when the core material 14 is impregnated with the unfoamed liquid elastomer, the core material 14 is pressed against the outer peripheral surface of the drum 10 by the supporting member, and the nozzle 12 is moved to one end of the drum 10 by the moving means. The nozzle 12 is moved toward the other end of the drum 10 while allowing the unfoamed liquid elastomer to flow down from the nozzle 12 in this state. When the nozzle 12 reaches the other end, the flow of the unfoamed liquid elastomer from the nozzle 12 is stopped. It should be noted that the step of flowing the unfoamed liquid elastomer through the nozzle 12 is repeated a predetermined number of times so as to match the required impregnation amount of the unfoamed liquid elastomer.

After the step of flowing down the unfoamed liquid elastomer, that is, after a predetermined time (the time when most of the unfoamed liquid elastomer adhered to the drum surface is impregnated into the core material 14), pressure contact is performed for a certain time. The core material 14 is rotated as it is to separate the core material 14 from the drum 10, and then the drum 1
The rotation of 0 is stopped and the impregnation step is completed. After this, 1
Curing treatment is performed at 00 ° C. for 30 minutes to obtain a double feed preventing rubber roller.

The double feed preventing rubber roller 16 manufactured as described above is used in a state of being opposed to the conveying roller 18 as shown in FIG. The paper 13 in the paper feed tray 11 provided in front of the double feed prevention rubber roller 16 is pulled out by the pickup roller 15, and is nipped by the conveyance roller 18 and the double feed prevention rubber roller 16, and is conveyed in the nipped state. The paper 17 is conveyed by rotating the roller 18 and the double feed preventing rubber roller 16. In this case, the double feed preventing rubber roller 16 is rotationally driven in the opposite direction to the conveying roller 18, but since there is a torque limiter (not shown),
Between the conveying roller 18 and the double feeding rubber roller 16, the paper 1
When 7 sheets of paper 17 have entered, they are driven, but when 2 sheets of paper 17 have entered, they are stopped or reversely rotated.

In the above description, the coefficient of friction between the paper 17 and the paper 17 is set to 0.6, and the coefficient of friction between the paper 17 and the rubber roller 16 for preventing double feed is set to 1.0. Has been done. The coefficient of friction between the transport roller 18 and the paper 17 is set to 2.0. In the above-described conveyance, in the normal state, the paper 17 is conveyed by being sandwiched between the conveyance roller 18 and the double feed preventing rubber roller 16 one by one, but the pickup roller 15 clamps a plurality of papers 17, for example. In this case, the coefficient of friction between the paper and the multi-feed preventing rubber roller 16 is set to be larger than the coefficient of friction between the paper 17 and the paper 17, so the multi-feed preventing rubber roller 16
The paper 17 in contact with is held on the double feed prevention rubber roller 16 until the number of sheets of paper sandwiched between the conveyance roller 18 and the double feed prevention rubber roller 16 becomes one, and the double feed is carried out. Is prevented.

[0032]

EXAMPLES The present invention will be described below with reference to examples.

Example 1 A core material made of ether type continuous foaming urethane rubber was impregnated with the above ether type foaming liquid urethane rubber by the impregnation method according to the present invention to obtain a double feed preventing rubber roller. Check the transmission rate and the presence of vibration noise, and
It was shown to. The impregnation was performed under the following conditions. External shape of core material: 3 cm Hardness of core material: 42 kg / 314 cm ² Pressure contact force of core material with respect to drum: 100 g / cm ² Flowing method of unfoamed liquid urethane rubber: Nozzle moving method Flow rate of unfoamed liquid urethane rubber: 2 0.5 cm ³ / sec

Example 2 The hardness of the ether-based continuous foamed elastomer was 70 kg / 31.
A double feed preventing rubber roller was manufactured under the same conditions as in Example 1 except that the feed rate was 4 cm ^2, and the double feed occurrence rate and the presence or absence of vibration noise were confirmed.

[0035]Comparative Example 1 Manufactures rubber rollers made of unfoamed EPDM rubber and causes double feed
The rate and the presence or absence of vibration noise were confirmed and shown in Table 1. Not yet issued
The foam EPDM rubber has a hardness of 30 kg / 314 cm. ² age
It was

Comparative Example 2 A double feed preventing rubber roller was manufactured under the same conditions as in Example 1 except that the core material was impregnated with the unfoamed liquid urethane rubber by spray coating. The presence or absence was confirmed, and the results are shown in Table 1.

[0037]

From Table 1 above, in Examples 1 and 2 in which the impregnation according to the present invention was performed, compared with Comparative Example 2 in which impregnation was performed by spray coating, particularly 2
Comparing the cases where a large number of papers of ten thousand or more were conveyed, it was revealed that the frequency of double feed was low. In particular, in Example 1, even when 100,000 sheets of paper are conveyed, there is no double feed, and the method for manufacturing the double feed preventing rubber roller according to the present invention is extremely effective in preventing double feed. It became clear that

[0039]

As described above, according to the present invention, a double feed preventing member which can reliably prevent double feed and is excellent in wear resistance, and a manufacturing method for obtaining the same are provided. To be done.

[Brief description of drawings]

FIG. 1A is a perspective view for explaining a method of manufacturing a double feed preventing rubber roller according to the present invention, and FIG. 1B is a view of FIG. 1A viewed from the axial direction of the roller.

FIG. 2 is a side view showing an example of use of a double feed prevention rubber roller manufactured by the method for producing a double feed prevention rubber roller according to the present invention.

FIG. 3 is a side view showing a nip width W between a double feed preventing rubber roller and a conveying roller.

FIG. 4 is a perspective view for explaining a conventional method for manufacturing a double feed preventing rubber roller.

[Explanation of symbols]

 10 drum 14 core material

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location // G03G 15/00 510 B29K 75:00

Claims (14)

[Claims] 1. A double feed preventing member in which an unfoamed liquid elastomer is impregnated on the surface of a continuous foam type elastomer and the inner surface of continuous cells to form a cured coating. 2. The double-feed preventing member according to claim 1, wherein the double-feed preventing member is a roller-shaped member. 3. The multi-feed preventing member according to claim 1, wherein the multi-feed preventing member is a sheet-like material. 4. The multi-feed preventing member according to claim 1, wherein the unfoamed liquid elastomer is an ether-based unfoamed liquid elastomer. 5. The ether-based unfoamed liquid elastomer is an ether-based unfoamed liquid urethane rubber.
The described double feed prevention member. 6. The double-feed preventing member according to claim 1, wherein the continuous foaming elastomer is an ether-based continuous foaming elastomer. 7. The ether-based continuous foaming-type elastomer is an ether-based continuous foaming-type urethane rubber.
The described double feed prevention member. 8. An unfoamed liquid elastomer attached to the outer peripheral surface of a rotating drum is supplied to the outer peripheral surface of a substantially cylindrical core material formed of a continuous foamed elastomer to impregnate the unfoamed liquid elastomer. A method of manufacturing a double feed preventing member for preventing double feed of paper, comprising: an unfoamed liquid elastomer flowing step of flowing down an unfoamed liquid elastomer onto the outer peripheral surface of the drum; and the core on the outer peripheral surface of the drum. A method for producing a double feed preventing member, comprising: a drum in which the unfoamed liquid elastomer is flowed down while the outer peripheral surface of the material is in pressure contact; and a pressure contact rotation step of rotating a core material. Method. 9. The method for manufacturing a double feed prevention member according to claim 8, wherein a sheet-shaped continuous foaming elastomer member wound around a shaft is used instead of the core material. 10. The method of manufacturing a double feed preventing member according to claim 8, wherein the unfoamed liquid elastomer flowing down step is completed before the pressure contact rotating step is completed. 11. The unfoamed liquid elastomer is an ether-based unfoamed liquid elastomer.
The method for manufacturing the double feed prevention member according to any one of 1. 12. The ether unfoamed liquid urethane rubber is an ether unfoamed liquid urethane rubber.
1. The method for manufacturing the double feed preventing member according to 1. 13. The continuous foamable elastomer is an ether-based continuous foamable elastomer.
The method for manufacturing the double feed prevention member according to any one of 1. 14. The continuous ether foam type elastomer is an ether continuous foam urethane rubber.
3. The method for manufacturing the double feed prevention member according to item 3.