JPH07134508A - Method for forming image on envelope - Google Patents

Abstract

PURPOSE:To prevent an envelope from wrinkling by providing an envelope main body with a fixing member preventing a pair of constituting pieces from being relatively moved in a surface direction. CONSTITUTION:An adhesive tape provided with a prescribed adhesive surface is used as a deviation preventing tape 1 being the fixing member which can be peeled. The tape 1 is stuck to the lower side (inside) of a flap P3 so as to fix an inside between a back surface P2 and a front surface P1 being as a pair of constituting pieces. When the envelope main body A is carried by the fixing device of a copying machine, it is interposed and carried by the rotation of a fixed roller (driving of metal whose rigidity is high and a pressure roller (driven) such as a rubber-like elastic body whose rigidity is low. When the main body A is interposed and carried by rotating a pair of rollers in such a way, it is closely brought into contact with the roller whose rigidity is high and it arcs because the roller whose rigidity is low is elastically deformed. Since the surfaces P1 and P2 of the main body A are fixed, the actual carrying quantity of the front and the back surfaces is made to coincide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an envelope used in an image forming apparatus such as a copying machine or a laser printer and conveyed by a pair of rollers.

[0002]

2. Description of the Related Art Conventionally, an envelope used in an electrophotographic or image forming apparatus such as a laser printer or a copying machine is shown in FIG. Reference numerals 101 and 102 are a pair of constituent pieces that form the front surface and the back surface of the envelope body 100, and 103 is a flap portion to which an adhesive is applied for sealing.

Envelopes come in various sizes and shapes. Figure 1
1 and FIG. 13 show typical ones. FIG. 11 shows COM10 (US) and DL (Europe) generally used in Europe and America, and the flap 103 (opening) is on the long side of the rectangle. On the other hand, an envelope often used in Japan is of the type shown in FIG. 13, and the flap 103 (opening) is on the short side of the rectangle.

When printing an envelope with the image forming apparatus,
Both envelopes typically have the long sides of the rectangle inserted vertically into the device.

Further, as a conventional fixing device, as shown in FIG. 12, due to its high reliability and the like, a rigid fixing roller 10 is used.
A fixing device including 4 and a pressure roller 105 formed of a rubber roller having an elastic surface has been widely used. Then, the envelope body 100 includes the rollers 104 and 105.
Is rotated and is nipped and conveyed in the direction of the arrow.

[0006]

However, the above-mentioned conventional example has a drawback that wrinkles are generated especially in the envelope of the type shown in FIG. 11 when passing through the fixing device. Since the fixing device is composed of a rigid fixing roller (drive) and a pressure roller (following) formed by an elastic rubber roller on the surface, the envelope has wrinkles due to a difference in conveyance speed between two front and back sheets of paper. Occurs. The wrinkle generation principle will be described later.

FIG. 14 shows a case where a long side of a rectangle is vertically inserted into a fixing device. Front and back two sheets of paper 101, 102
However, since only one side (opposite side to the flap part) is fixed, it can be seen that the difference in transport speed between the front and back sheets gradually accumulates and wrinkles occur at the rear end of the envelope.

The principle of wrinkling will be described with reference to FIG.
That is, the angular velocity of the fixing roller 102 is ω, and the component piece 10 is
Assuming that the thickness of 1 is t, the velocity V _P1 of the component piece 101 is V _P1 = R ₁ ω = [R + (1/2) t] · ω Similarly, the velocity V _P2 of the component piece 102 is V _P2 R ₂ · ω = [R + (3/2) t] · ω.

Therefore, the component piece 102 on the back surface side and the component piece 101 on the front surface side relatively move in the surface direction, and t / [R + (2/2) t] × 100 (%) ≈ (t / R)
It is sent by x100 (%) faster, and the difference in the feed amount is accumulated at the rear end of the envelope 100, and the component piece 102 becomes wrinkled.

For example, an envelope length of 200 mm and a paper thickness of 0.1 m
When m and R = 10 mm, the difference between the front and back feed amount is 2 m
It will reach m. This can also be confirmed by sandwiching two sheets of plain paper between the fixing rollers instead of the envelope and conveying them, and examining the difference in the feeding amount.

To solve the above problem, the fixing roller 10
The radius R of 4 should be increased, but the size of the device should be increased.
It causes cost increase and cannot be infinitely increased.

The present invention is to solve the above-mentioned problems, and when the envelope body is nipped and conveyed by a pair of rollers,
An object of the present invention is to provide an envelope in which the conveyance amounts of a pair of constituent pieces can be matched.

[0013]

In order to achieve the above object, the present invention provides an envelope main body which is sandwiched and conveyed by a pair of rollers having different rigidity, and the envelope main body constitutes a pair of constituent pieces constituting the front and back of the envelope main body. In the envelope having the above, the envelope body is provided with a fixing member for preventing relative movement of the pair of component pieces in the surface direction.

The fixing member can be peeled off from the envelope body.

The fixing member is an adhesive tape attached to a pair of constituent pieces.

The fixing member is a pair of friction members respectively provided on a pair of component pieces, and the pair of friction members have irregularities that engage with each other.

The fixing member is an adhesive.

[0018]

When the envelope body is nipped and conveyed by rotating the pair of rollers, the roller having lower rigidity is elastically deformed, so that the envelope body comes into close contact with the roller having higher rigidity to form an arc.

Although the angular velocities of the constituent pieces located on the inner side and the outer constituent pieces are different from each other, since the pair of constituent pieces are fixed in the surface direction by the fixing member, the conveying amount of the pair of constituent pieces is small. Will be equal.

The fixing member can be peeled off from the envelope body.

Further, the pair of constituent pieces are fixed in the surface direction by the adhesive force of the adhesive tape.

Further, the pair of component pieces are fixed in the surface direction by the engaging force of the unevenness of the pair of friction members.

Further, the pair of constituent pieces are fixed in the surface direction by the adhesive force of the adhesive.

[0024]

【Example】

(Embodiment 1) First, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a rear view of the envelope body A of the first embodiment. Reference numeral 1 is a slip prevention tape as a peelable fixing member, and in this embodiment, an adhesive tape having a predetermined adhesive surface B was used.

The displacement prevention tape 1 is attached to the lower side (inner side) of the flap P ₃ so as to fix the inner surfaces of the back surface P ₂ and the front surface P ₁ as a pair of constituent pieces. FIG. 1B is a view of the envelope body A viewed from the back side with the flap P ₃ opened, and shows how the deviation prevention tape 1 is attached so that it can be seen clearly. FIG. 1C is a development view of the envelope body A.
FIG. 2 is a cross-sectional view of the envelope. The black surface of the deviation prevention tape 1 is an adhesive surface and fixes the back surface P ₂ and the front surface P ₁ .

FIG. 3 shows how the envelope body A is conveyed by the fixing device of the copying machine. Reference numeral 50 is a fixing roller (driving) having a high rigidity such as metal, and 51 is a pressure roller (following) having a low rigidity such as a rubber-like elastic body.

The envelope body A is nipped and conveyed by the rotation of the rollers 50 and 51.

When the envelope body A is nipped and conveyed by rotating the pair of rollers 50 and 51, the roller 51 having lower rigidity elastically deforms, so that the envelope body A comes into close contact with the roller 50 having higher rigidity to form an arc shape. Becomes

Assuming that the angular velocity of the fixing roller 50 is ω and the thickness of the paper is t, the transport velocity V _P1 of the surface P ₁ is V _P1 = R ₁ ω = [R + (1/2) t] Similarly to ω, the conveyance speed V _P2 of the back surface P ₂ is V _P2 = R ₂ ω = [R + (3/2) t] · ω.

However, in the present invention, since the front surface P ₁ and the back surface P ₂ are fixed by the deviation prevention tape 1 so as not to be displaced in the surface direction, the actual conveyance amounts of the front and back surfaces are the same. Therefore, wrinkles do not occur on the envelope body A. This state is shown in FIG. Like the conventional example, the fixing device is composed of a rigid fixing roller (driving) and a pressure roller (following) formed of a rubber roller having an elastic surface, but the effect of the present invention is that two front and back envelopes are used. Since there is no difference in the transport speed of the paper, the occurrence of wrinkles is prevented. In addition, the image formed on the envelope body A according to the present invention is free from misalignment and dirt. In particular, the effect was remarkable in the envelope that absorbed moisture.

This is the surface P which has been a problem in the conventional example.
_This is because the difference in feed amount between the back surface P ₂ and the back surface P ₂ is eliminated by the deviation prevention tape. After the printing is completed, the deviation prevention tape 1 is peeled off, the contents are put in the envelope and sealed, and the envelope according to the present invention is not inferior to the conventional product in operability.

In this embodiment, the deviation prevention tape 1 is a menting tape 810 in which synthetic rubber adhesive (component) acrylic rubber synthetic rubber is dispersed in an organic solvent such as normal hexane. It has been made possible by using. For the slip prevention tape,
Of course, the present invention is not limited to this, and any other equivalent product can be used.

Although the peelable adhesive tape is used in the above embodiments, the adhesive tape is not limited to this, and the peelable adhesive tape may be used as the front surface P ₁ and the back surface P ₂ , for example, a spray glue 55 (synthesized by 3M) The same effect could be obtained by applying a rubber adhesive).

(Embodiment 2) Next, an example using a double flap type is shown in FIG. A feature of the double flap type is that not only the flap P ₃ but also the folded back portion of the upper end portion of the back surface P ₂ is another flap P ₄ .

The double-flap envelope body A has a complicated structure, and it has the above-mentioned wrinkles when passing through the fixing device, image shift,
Dirt is very likely to occur.

However, the peelable deviation prevention tape 1 according to the present invention is attached, and the back surface P ₂ and the front surface P are provided via the flap P _4.
By fixing ₁ , it was possible to eliminate the difference in the feed amount between P ₂ and P ₁ and completely prevent wrinkles, image shifts, and stains.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. (A) is a back view of the envelope, and (B) is a back view with the flap P ₃ open. FIG. 6C is a back view of the envelope with the deviation prevention tape 2 removed.

In this embodiment, the flap P _{3 of the} envelope body A is
A seal portion 3 which is wet with a sticky adhesive for finally sealing the envelope is provided on the portion, and a slippery mold release for covering the flap-side surface 2b of the deviation prevention tape 2 with the seal 3 and the surface, whereas the opposite surface 2a is a releasable adhesive surfaces for displacement prevention, so as to fix the inner envelope backside P ₂ and envelopes surface P ₁ in 2a surface, in this single anti-displacement tape The feature is that they do not serve two functions.

The effect of this embodiment is that the back surface P ₂ and the front surface P ₁ are fixed when the flap P ₃ is bent as shown in FIG. No wrinkles, image shifts, and stains are prevented, and the same effect as in the first embodiment is obtained. Furthermore, after the printing is completed, if the contents are put in an envelope and the deviation prevention tape 2 is peeled off, the adhesive sticker 3 on the flap portion can easily perform the one-touch sealing.

In the envelope of Example 1, the flap may be adhered to the back surface by the adhesive of the flap portion when passing through the fixing device in a high humidity environment, and the envelope after printing may not be opened. In the example envelope, such a problem never occurs due to the effect of the deviation prevention tape 2. As described above, the envelope of this embodiment is easier to use than the envelope of Embodiment 1.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to FIG. (A) is a back view of the envelope, (B)
Is a development view (inner surface side), and (C) is a cross-sectional view of the deviation prevention member in the present embodiment.

In this embodiment, an ultra-thin magic tape (registered trademark) is used as a deviation preventing member on the inside and outside of the envelope.
The feature is that 4 and 5 are provided. These Velcro tapes 4 and 5 have a length of about 5 as shown in the enlarged sectional view of FIG.
Nylon fiber protrusions of 0 mm, width of about 10 mm, thickness of about 0.1 mm, and height of about 0.5 mm are formed on the surface to form minute irregularities. The thickness is about 1 mm each, but when they come into close contact, It is about 1.5 mm in total for two sheets and repels with a large frictional force against the displacement force.

Also in the third embodiment, due to the effect of the magic tape, there is no difference in the feed amount between the front surface P ₁ and the back surface P _{2, and} a good print can be obtained. From this, it was found that the deviation preventing member is not limited to the adhesive tapes of Examples 1 and 2, and good results can be obtained as long as the front surface and the back surface of the envelope are fixed against the deviation.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described with reference to FIG.
Will be explained. (A) is a back view of the envelope, and (B) is a developed view (inner surface side). In this embodiment, an ordinary adhesive agent for paper adhesion (the adhesive agent itself cannot be peeled off) is applied piecewise to the minute portion 6 (about 3 mm square) of the inner surface of the envelope, and the surface P ₁
And the back surface P ₂ are fixed, and printing is performed in this state. After printing, remove the adhesive and put the contents in an envelope to seal it.

In this embodiment, P ₁ and P ₂ are used for printing.
Is fixed and there is no difference in feed amount, so wrinkles, image shifts,
The occurrence of unevenness is prevented. Further, even when the adhesive of 6 was peeled off, since the adhesive was applied only to a minute portion, the envelope was hardly damaged and good results could be obtained.

Finally, FIG. 10 shows an image forming apparatus using the envelope according to the present invention for printing. The image forming apparatus of this example is a laser printer using an electrophotographic process.

Reference numeral 60 is a general reference numeral of the printer, 61 is an upper lid of the printer (process cartridge outlet), 62
Is a process cartridge that is attachable to and detachable from the printer body 60. The process cartridge of this example includes four process devices including a photosensitive drum 63 as an image carrier, a primary charging roller 64, a developing device 65, and a cleaner 66.

The photosensitive drum 63 is formed by forming an OPC photosensitive layer on the outer peripheral surface of a conductive drum base made of, for example, Al, and in the clockwise direction indicated by the arrow, a process speed (peripheral) of 50 mm / sec in this example. It is driven to rotate at a speed). The printer has a maximum throughput of 8 A4 size sheets.

The primary charging roller 64 is brought into pressure contact with the photosensitive drum 63 with a predetermined pressing force, and is rotated by the rotation of the photosensitive drum 63. A charging bias is applied to the primary charging roller 64 from a high-voltage power source (not shown) to uniformly negatively charge the surface of the rotary photosensitive drum 63.

The surface of the rotary photosensitive drum 63 that has been uniformly negatively charged by the charging roller 64 is subjected to scanning exposure by the laser light that is image-modulated and output from the laser scanner 67 in accordance with the target image information. , The potential of the scanning exposed portion is attenuated and an electrostatic latent image is formed on the surface of the rotary photosensitive drum 63 in correspondence with the target image information. The electrostatic latent image is developed as a toner image by the negative toner 68 of the reversal developing device. 69 is a developing sleeve.

Then, the toner image is fed to the envelope P which is fed from the paper feeding section to the transfer portion between the photosensitive drum 63 and the transfer roller 70 as the contact transfer means at the same timing as the rotation of the photosensitive drum 63. Transferred in sequence. The transfer roller 70 is pressed against the photosensitive drum 63 with a predetermined pressing force. The transfer roller 70 is the photosensitive drum 63.
A predetermined pressing force is pressed against the photosensitive drum 6
The photosensitive drum 63 is rotated in the forward direction at a peripheral speed substantially the same as that of No. 3, and a transfer bias is applied from a high voltage power source (not shown).

Reference numeral 71 denotes an envelope cassette of a sheet feeding section. From the cassette, a sheet feeding pickup roller 72 and a separating claw cooperate to feed one sheet of the envelope P, and a registration roller 73 synchronizes the sheet to transfer it. It is delivered to the site.

The envelope P that has passed the transfer portion is sequentially separated from the rotary photosensitive drum 63 and conveyed to the fixing device 50.
The transfer toner image is fixed. Reference numeral 50 denotes a fixing roller and a pressure roller, and the toner image is heated and fixed on the surface of the envelope P when the envelope P passes through a nip portion between the both rollers.

The fixing roller 50 of the fixing device 50 used in this embodiment has a structure in which a fluororesin layer is provided on the outer surface of a hollow aluminum cored bar and has an outer diameter of φ20. Further, a halogen heater (not shown) is arranged therein. As the pressure roller 51, a φ20 SUS core having a thickness of 6 mm and an elastic layer of low temperature vulcanizing silicone rubber (LTV) formed on the core was used.

The surface of the photosensitive drum 63 after the transfer of the toner image to the envelope P is cleaned by a cleaner 66 to remove adhered residual contaminants such as transfer residual toner, and is repeatedly used for image formation.

The envelope is printed as described above, but since the envelope P is conveyed by several rollers from the paper feeding to the completion of fixing, the envelope has a predetermined length (a length equal to or greater than the maximum inter-roller distance). Yes, it needs to print vertically.

[0057]

When the envelope body is nipped and conveyed by rotating the pair of rollers, the roller having lower rigidity is elastically deformed, so that the envelope body comes into close contact with the roller having higher rigidity to form an arc.

Although the angular velocities of the component pieces located inside are different from the angular velocities of the component pieces located outside, since the pair of component pieces are fixed in the surface direction by the fixing member, the conveyance amount of the pair of component pieces is Will be equal. Therefore, wrinkles do not occur.

[Brief description of drawings]

1A and 1B are plan views of an envelope of Example 1, FIG.
(C) is a development view of the envelope.

2 is a cross-sectional view of the envelope of FIG.

FIG. 3 is a side view of the envelope according to the first embodiment during conveyance.

FIG. 4 is a perspective view of the envelope according to the first embodiment during conveyance.

5A and 5B are plan views of the envelope of the second embodiment,
(C) is sectional drawing of the same envelope.

6 (A), (B) and (C) are plan views of the envelope of the third embodiment, and (D) is a plan view of the deviation prevention tape of the same embodiment.

7 is a cross-sectional view of the envelope of FIG.

8A is a plan view of the envelope of the fourth embodiment, FIG. 8B is a developed view of the envelope, and FIG. 8C is a side view of the deviation prevention member of the same embodiment.

9A is a plan view of the envelope of the fifth embodiment, and FIG. 9B is a development view of the same envelope.

FIG. 10 is a schematic view of an image forming apparatus for printing an envelope according to the present invention.

11A is a plan view of a conventional envelope, and FIG. 11B is a cross-sectional view of the same envelope.

FIG. 12 is a view showing the envelope of FIG. 11 during conveyance.

FIG. 13A is a plan view of a conventional envelope (domestic),
(B) is a cross-sectional view of the envelope.

FIG. 14 shows how a conventional envelope passes through a fixing device.

[Explanation of symbols]

1 Misalignment prevention tape A Envelope body P ₁ front surface P ₂ back surface

Front page continued (72) Inventor Koichi Suwa 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (4)

[Claims] 1. A pair of sheets of an envelope main body, comprising a pair of sheet-like constituent pieces constituting front and back sides, wherein the sides of the pair of sheet-like constituent pieces are connected so that at least one side is open. The relative movement of the strip-shaped component in the plane direction,
A first step of preventing by a fixing member, a second step of forming a toner image on a sheet-shaped component of the envelope body, and a pair of rollers having different rigidity sandwiching the envelope body on which the toner image is formed, and applying. A method of forming an image on an envelope, which comprises a third step of fixing the toner image on a sheet-shaped component by conveying the toner image under pressure. 2. The method for forming an image on an envelope according to claim 1, wherein the pair of rollers nip and heat the envelope body. 3. The method for forming an image on an envelope according to claim 1, wherein the fixing member is removable from the envelope body. 4. An envelope main body having a pair of sheet-like constituent pieces constituting front and back sides, and a side of the pair of sheet-like constituent pieces being connected to each other so that at least one side is open. An envelope used in the method for forming an image on the envelope according to claim 1.