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  3.   誠  文  堂
  4. I made a pi stamp.
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  • Nov 22, 2024
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Nov 22, 2024

I made a pi stamp.

  誠   文  堂   誠  文  堂
At one point, there was a lot of talk on "X" and online news about a certain stamp shop in Shimane Prefecture that carved the value of pi into their stamps. If I remember correctly, it was also featured on television... I apologize for bringing up a personal matter, but my wife, who is from Shimane Prefecture, was very pleased with this news. However, gradually, my artisan spirit began to ignite... I also tried my hand at carving. Could I carve something even better than the stamp shop in Shimane? φ15, φ18, φ21... which material should I carve on? What should I carve? After much deliberation, I decided to try to carve as much of pi as possible. I thought, "Let's try carving a rather long sentence like 'Seibundo's high-precision rubber relief printing has been built on over half a century of unique research and development since its founding in 1948...'" I did it. I would be happy if you could take a look when you have some free time. The PDF document of the pi stamp might be easier to read. By the way, our company can also carve letters as small as 0.5mm into molds, so we can create rubber stamps that are 0.5mm in size as well. Tomorrow is "Labor Thanksgiving Day," a holiday. Let's both do our best today. Thank you very much.
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円周率ハンコ.pdf[192719]

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This is the page for registered seals.
We can create various types of seals such as registered seals, bank seals, personal seals, corporate seals, and address seals, so please feel free to contact us.

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Corporate seal, company seal

Corporate seal, company seal

The company seal is an important stamp that represents the authority and symbol of a company or organization. It is used on contracts, receipts, and other general documents for corporations and organizations.

  • Marking machine

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Corporate seal, representative seal

Corporate seal, representative seal

The representative seal is an essential stamp for the registration of company establishment. It is a legally important corporate seal that proves social credibility and authority. It is a significant stamp registered with the Legal Affairs Bureau, accompanied by legal authority and obligations.

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Corporate seal discount seal

Corporate seal discount seal

The seal is stamped across two documents for important documents, stock certificates, etc., at the time of the contract. It serves as evidence for estimates, bids, contracts, and so on.

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Address stamp / check stamp

Address seal and check seal

■General seals and rubber stamps will be provided according to your requests. ■For corporate clients such as companies and schools, we offer special pricing and significant cost reductions. ■We handle various manufacturers for date stamps, rotary stamps, subject stamps, computer subject stamps, etc. Please request a quote first.

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Seal or official seal

Seal (or official seal)

A registered seal is the most important type of seal and is associated with the establishment of legal and social rights and obligations. It is a seal that is registered at the municipal office and for which a seal certificate is obtained. Generally, it includes the person's name. It is used for contract documents, real estate registration and sales such as land and buildings, and vehicle registration, among other purposes.

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Bank seal, personal seal, correction seal

Bank seal, personal seal, correction seal

"Bank seal" The bank seal, also known as the treasure seal, is an important stamp used for financial transactions, such as time deposits, transfer deposits, and postal savings. "Personal seal" The personal seal is commonly used for general office work (such as invoices, attendance records, and simple monetary receipts) and is a stamp that is always carried for the purpose of stamping.

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General rubber stamp (Techno Touch data stamp)

General rubber stamp (Techno Touch data stamp)

■We will respond to your requests for general seals and rubber stamps. ■For corporate clients such as companies and schools, we offer special pricing and further significant cost reductions. ■We handle various manufacturers for date stamps, rotary stamps, subject stamps, computer subject stamps, etc. Please request a quote first.

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Modular connected rubber stamp (minimum character size 0.5mm)

Modular connection rubber stamp (minimum character size 0.5mm!!)

Reconfigurable linked rubber stamp (it has a handle). Because the tip is narrow, it can be used to stamp areas that are typically inaccessible to regular rubber stamps, such as gaps in products.

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Hand-operated stamp "Direct Simple Hand Stamp" demo machine available for free rental.

Direct Simple Hand Stamp

This is a manual type simple hand stamp. You can freely choose the font, size of the characters, pitch, and more. The ink pad is built into the main body, making it ideal for continuous stamping.

  • Office supplies and stationery

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Seal Negative Film Printing System

This is a negative film printing system that uses commercially available inkjet printers (specified models) as a replacement for the existing plate-making system.

With the recent spread of digital cameras, film and opaque materials for the seal industry are disappearing. In fact, matte film has vanished from this industry. Those who have been using the previous system have made tremendous efforts to adapt, but this system does not require any darkroom, camera, film, developing solution, fixing solution, opaque materials, etc., unlike traditional systems. There is also no need for the technique of developing film. Additionally, film, developing solution, and fixing solution must be treated as industrial waste when disposed of, but this system produces no industrial waste at all, and everything can be disposed of as combustible waste without any issues.

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Related catalog(13)

Corporate seal, representative seal

Corporate seal, representative seal

PRODUCT
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Corporate seal - corner seal

Corporate seal - corner seal

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Address stamp / check stamp

Address stamp / check stamp

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General rubber stamps and data stamps

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Corporate seal discount seal

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Bank seal, personal seal, correction seal

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Registered seal

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Office Supplies Handheld Stamp "Direct Simple Hand Stamp"

Office Supplies Handheld Stamp "Direct Simple Hand Stamp"

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Eternal Ink (STAMP INK) - Catalog

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Modular stamp with interchangeable components

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Simple Hand Stamp - One-Touch Hand Stamp

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Seal Negative Film Printing System

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Office Supplies Seibundo Co., Ltd. Comprehensive Catalog of Marking Stamps

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SPACECOOL and Ronseal Industries jointly exhibit at the "Hokkaido Energy Technology Innovation EXPO 2025" - Introducing solutions for the rapidly advancing heat countermeasures in Hokkaido.

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SPACECOOL Co., Ltd. is pleased to announce that it will jointly exhibit a booth with Ronsir Co., Ltd. at the "Hokkaido Energy Technology Innovation EXPO 2025," which will be held at Access Sapporo (Hokkaido) from October 8 (Wednesday) to October 9 (Thursday), 2025. Due to recent extreme heat, heat mitigation measures are also being sought in Hokkaido. At this exhibition, we will introduce heat mitigation strategies for buildings and outdoor equipment using SPACECOOL, along with actual implementation examples in Hokkaido, in collaboration with Ronsir Co., Ltd. Main Exhibition Content SPACECOOL Co., Ltd. - Explanation of SPACECOOL technology and introduction of actual implementation examples - Samples of SPACECOOL products (films, magnetic sheets, membrane materials, etc.) Ronsir Co., Ltd.: Innovation Proof RR - Actual model and implementation examples of the SPACECOOL integrated waterproof sheet "Innovation Proof RR" - Temperature sensation device for Innovation Proof RR Exhibition Overview Dates: October 8 (Wednesday) to October 9 (Thursday), 2025, 10:00 AM to 4:00 PM Venue: Hokkaido, Access Sapporo Our booth number: 405 (2 booths) *Advance registration is required for attendance (free).

Sep 09, 2025

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Image of wireless set usage

Solve your issues with wired bed exit sensors by connecting a wireless set linked to the nurse call system!

  • NEW
  • PRODUCT

Do you have any concerns or requests regarding wired bed exit sensors? × Tangling and tripping of wired cables × Cable disconnection or damage × Worry about forgetting to turn on the switch after temporarily stopping the sensor. × Want to be notified of bed exit even from a location away from the nurse call outlet. Such concerns can be resolved simply by connecting to a wireless set linked to the nurse call system! Our nurse call linked wireless set allows you to connect bed exit sensors like "Ugo-kun," "Foldable Thin Matta-kun," "Ayumi-chan," and "Just Place Pole-kun" to transmitters and receivers, reducing wiring around the bed, alleviating concerns about tripping and falling due to cables, and contributing to a tidier work environment. Furthermore, it enables the use of bed exit sensors even from locations away from the nurse call outlet, allowing for more flexible equipment placement.

Sep 09, 2025

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PFAS Regulation Countermeasures! ■■ Leak Test Equipment for Small Electronic Components|MSA-0101 series ■■ Does not use fluorinated inert fluids. PFAS-free. Offers accuracy equal to or better than liquid immersion testing.

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● This is a leak testing device for small electronic components that does not use fluorinated inert liquids (PFAS-free). ● There is no longer a need for unstable visual confirmation through liquid immersion testing. It adopts a quantitative testing method that allows for stable pressure leak testing. ● It is a tabletop leak testing device specifically for gross leaks, with accuracy equal to or greater than that of liquid immersion testing. ● The detectable range is approximately 1×10⁻² Pa·m³/s to 1×10⁻⁶ Pa·m³/s (varies depending on the target product). ● It is suitable for sealed structures ranging from a few millimeters to a maximum of 80 × 70 mm. Please feel free to contact us for more information!

Sep 09, 2025

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Search for products based on their intended use.

Hotron's vehicle detection sensors contribute to efficient parking management, from coin parking to large-scale parking lots.

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  • PRODUCT

Hotron's vehicle detection sensors allow you to search for products that meet your needs in three categories: "Purpose of Use," "Location of Use," and "Product List." The sensors detect the passage of vehicles, alerting you with rotating lights or switching the display of parking availability. They manage vehicle presence, full parking, and exit warnings in parking lots, contributing to safe driving and smooth operational management within the parking area. They are used in various settings, from coin-operated parking to large-scale parking lots.

Sep 09, 2025

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[Cast Iron Crack] We will repair cracks in metal products without applying heat.

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The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact to the base material. Repairs can be carried out even in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

Sep 09, 2025

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  • ”分離できるか?”ではなく”どう分離するか” 分離効率×ランニングコスト×安定稼働 業界・用途に応じた多様な技術と経験 実用レベルで選ばれる遠心分離機
  • 義務化された熱中症対策に取り組む製造現場、工場、物流倉庫へ 排気熱風なく※室温-4.1℃の冷風を 工事不要で暑さ対策 気化式スポットクーラー Pure Drive ピュアドライブ ※環境条件…室温35℃/湿度50%/風量「中」
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