Adhesive for tennis ball
US-2020109318-A1 · Apr 9, 2020 · US
Aqueous adhesive for tennis ball
US12290722B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12290722-B2 |
| Application number | US-202217684572-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 2, 2022 |
| Priority date | Mar 3, 2021 |
| Publication date | May 6, 2025 |
| Grant date | May 6, 2025 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The aqueous adhesive for a tennis ball includes rubber latex. The rubber latex is a mixture of liquid rubber latex and solid rubber latex. A ratio of liquid rubber to an entire rubber component contained in the rubber latex is greater than 20% by weight and less than 90% by weight in terms of solid content. The tennis ball includes a seam formed of the aqueous adhesive for a tennis ball.
First claim
Opening claim text (preview).
What is claimed is: 1. A tennis ball comprising: a core; two pieces of felt covering the core; and a seam positioned in a gap between the two pieces of the felt, wherein the seam is formed of an aqueous adhesive, the aqueous adhesive comprises rubber latex, the rubber latex is a mixture of liquid rubber latex and solid rubber latex, a ratio of liquid rubber to an entire rubber component contained in the rubber latex is greater than 20% by weight and less than 90% by weight in terms of solid content, and a Mooney viscosity (ML 1+4 (100° C.)) of a rubber component comprising the liquid rubber latex and the solid rubber latex is not greater than 6.0. 2. The tennis ball according to claim 1 , wherein a Mooney viscosity (ML 1+4 (100° C.)) of the aqueous adhesive is not greater than 10. 3. The tennis ball according to claim 1 , wherein a number average molecular weight of the liquid rubber is not less than 10,000 and not greater than 60,000. 4. The tennis ball according to claim 1 , wherein the aqueous adhesive further comprises a thiuram-based vulcanization accelerator. 5. The tennis ball according to claim 1 , wherein the liquid rubber latex is isoprene rubber. 6. The tennis ball according to claim 1 , wherein the solid rubber latex is isoprene rubber. 7. The tennis ball according to claim 1 , wherein the aqueous adhesive further comprises a vulcanization accelerator in an amount of not less than 1.5 parts by weight and not greater than 3.5 parts by weight with respect to 100 parts by weight of the entire rubber component in terms of solid content. 8. The tennis ball according to claim 1 , wherein the aqueous adhesive further comprises an inorganic filler in an amount of not less than 5 parts by weight and not greater than 40 parts by weight with respect to 100 parts by weight of the entire rubber component in terms of solid content. 9. The tennis ball according to claim 1 , wherein a total solid content concentration of the aqueous adhesive is not less than 5.0% by weight and not greater than 80% by weight. 10. The tennis ball according to claim 1 , wherein the solid rubber latex is not a natural rubber latex.
Assignees
Inventors
Classifications
Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons · CPC title
Tennis · CPC title
- A63B39/08Primary
made of two halves · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12290722B2 cover?
- The aqueous adhesive for a tennis ball includes rubber latex. The rubber latex is a mixture of liquid rubber latex and solid rubber latex. A ratio of liquid rubber to an entire rubber component contained in the rubber latex is greater than 20% by weight and less than 90% by weight in terms of solid content. The tennis ball includes a seam formed of the aqueous adhesive for a tennis ball.
- Who is the assignee on this patent?
- Sumitomo Rubber Ind
- What technology area does this patent fall under?
- Primary CPC classification A63B39/08. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue May 06 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).